Honda K engine explained

The Honda K-series engine is a line of four-cylinder four-stroke car engine introduced in 2001. The K-series engines are equipped with DOHC valvetrains and use roller rockers on the cylinder head to reduce friction. The engines use a coil-on-plug, distributorless ignition system with a coil for each spark plug. This system forgoes the use of a conventional distributor-based ignition timing system in favor of a computer-controlled system that allows the ECU to control ignition timings based on various sensor inputs. The cylinders have cast iron sleeves similar to the B- and F-series engines, as opposed to the FRM cylinders found in the H- and newer F-series engines found only in the Honda S2000.

Similar to B series, the K-series car engines have two short blocks with the same design; the only difference between them being the deck height. K20 uses the short block with a deck height of where K23 and K24 block has a deck height of .^[1]

Two versions of the Honda i-VTEC system can be found on a K-series engine, and both versions can come with variable timing control (VTC) on the intake cam. The VTEC system on engines like the K20A3 only operate on the intake cam; at low rpm only one intake valve is fully opened, the other opening just slightly to create a swirl effect in the combustion chamber for improved fuel atomization. At high engine speeds, both intake valves open fully to improve engine breathing. In engines such as the K20A2 found in the Acura RSX Type-S, the VTEC system operates on both the intake and exhaust valves, allowing both to benefit from multiple cam profiles. A modified K20C engine is used in motorsport, as the Sports Car Club of America Formula 3 and 4 series that run in North America both use a K20C engine, with the Formula 4 engine not having a turbocharger. These are gaining a following in the import scene, but also among hot rodders and kit car enthusiasts, because they can be put in longitudinal rear wheel drive layouts.

Another significant difference between K-series engines is the alignment of the crankshaft to the center line of the bore. The K20C1 engine block has an offset alignment.^[2] Engines that do not have their crank shaft aligned to the bore are known as Desaxe engines. On the K20C1 engine this allows the power stroke to have more leverage and less thrust waste on sidewalls.

K20

K20A (i-VTEC)

Honda K20A (i-VTEC)
Manufacturer:	Honda Motor Co., Ltd.
Production:	2001 - 2011
Configuration:	I4
Displacement:	1998cc
Bore:	863NaN3
Stroke:	863NaN3
Head:	NSH 14
Valvetrain:	DOHC 4 valves x cyl w/ i-VTEC on some models
Compression:	See left for specific application.
Fuelsystem:	Fuel injection
Management:	ECU
Fueltype:	Petrol
Power:	See left for specific application.
Torque:	See left for specific application.
Weight:	403lbs (with gearbox), 275lbs (without gearbox)

Applications:

Engine	Application	Compression	Power	Torque	Redline	Rev limiter	i-VTEC engagement	Intake Manifold
K20A (High Performance)	2001 - 2006 Honda Civic Type R (JDM)	11.5:1	158order=flipNaNorder=flip @ 8000 RPM	202order=flipNaNorder=flip @ 7000 RPM		8400 RPM	6000 RPM	PRC
	2001 - 2006 Honda Integra Type R (JDM)	11.5:1	162order=flipNaNorder=flip @ 8000 RPM	206order=flipNaNorder=flip @ 7000 RPM	8400 RPM	8600 RPM	6000 RPM	PRC
	2002 - 2008 Honda Accord Euro R (JDM)	11.5:1	162order=flipNaNorder=flip @ 8000 RPM	206order=flipNaNorder=flip @ 6000 RPM		8400 RPM	6000 RPM	RBC
	2007 - 2011 Honda Civic Type R (JDM)	11.7:1	165order=flipNaNorder=flip @ 8000 RPM	215order=flipNaNorder=flip @ 6100 RPM	8400 RPM	8600 RPM	5800 RPM	RRC
K20A (Eco)	2000 - 2006 Honda Stream (JDM) (RN3, FWD)^[3]	9.7:1	115order=flipNaNorder=flip @ 6500 RPM	188order=flipNaNorder=flip @ 4000 RPM	6800 RPM			PNC
	2000 - 2006 Honda Stream (JDM) (RN4, AWD)	9.8:1	116order=flipNaNorder=flip @ 6500 RPM	190order=flipNaNorder=flip @ 4000 RPM	6800 RPM	7000		PNC
	2001 - 2004 Honda CR-V (JDM)	9.8:1	112order=flipNaNorder=flip @ 6500 RPM	190order=flipNaNorder=flip @ 4000 RPM	6800 RPM			PNA
	2001 - 2006 Honda Integra Type S (JDM)^[4]	9.8:1	118order=flipNaNorder=flip @ 6500 RPM	191order=flipNaNorder=flip @ 4000 RPM	6800 RPM			PNC
	2001 - 2005 Honda Stepwgn (JDM)^[5]	9.8:1	118order=flipNaNorder=flip @ 6500 RPM	191order=flipNaNorder=flip @ 4000 RPM	6800 RPM			PNC
	2001 - 2005 Honda Stepwgn Spada (JDM)^[6]	9.7:1	118order=flipNaNorder=flip @ 6500 RPM	191order=flipNaNorder=flip @ 4000 RPM	6800 RPM			PNC
	2005 - 2009 Honda Stepwgn (JDM)^[7]	9.6:1	114order=flipNaNorder=flip @ 6000 RPM	188order=flipNaNorder=flip @ 4500 RPM	6800 RPM			RTA
	2002 - 2008 Honda Accord (JDM) (CL7-CM1, FWD)^[8]	9.8:1	114order=flipNaNorder=flip @ 6000 RPM	188order=flipNaNorder=flip @ 4500 RPM	6800 RPM			RAA
	2002 - 2008 Honda Accord (JDM) (CL8, AWD)	9.8:1	112order=flipNaNorder=flip @ 6000 RPM	186order=flipNaNorder=flip @ 4500 RPM	6800 RPM			RAA
	2004 - 2009 Honda Edix (JDM)^[9]	9.7:1	115order=flipNaNorder=flip @ 6500 RPM	188order=flipNaNorder=flip @ 4000 RPM	6800 RPM			PNC
	2005 - 2010 Honda Civic (JDM)^[10]	9.6:1	114order=flipNaNorder=flip @ 6000 RPM	188order=flipNaNorder=flip @ 4500 RPM	6800 RPM			RTB
K20A1	2001 - 2006 Honda Stream (RN3, FWD)	9.7:1	156hp @ 6500 RPM	139lb.ft @ 4000 RPM	6800 RPM			PNA
K20A1	2001 - 2006 Honda Stream (RN4, AWD)	9.8:1	158hp @ 6500 RPM	140lb.ft @ 4000 RPM	6800 RPM			PNC
K20A2	2001 - 2006 Honda Civic Type R	11.0:1	200hp @ 7400 RPM	139lb.ft @ 5900 RPM	7900 RPM	8250 RPM	5800 RPM	PRB
	2002 - 2004 Acura RSX Type S	11.0:1	200hp @ 7400 RPM	142lb.ft @ 6000 RPM	7900 RPM	8250 RPM	5800 RPM	PRB
	2002 - 2004 Honda Integra Type R (/)	11.0:1	200hp @ 7400 RPM	142lb.ft @ 6000 RPM	7800 RPM	8100 RPM	5800 RPM
K20A3	2002 - 2006 Acura RSX	9.8:1	160hp @ 6500 RPM	142lb.ft @ 4000 RPM	6800 RPM	7000 RPM	2300 RPM^[11]	PNC
	2002 - 2005 Honda Civic	9.8:1	160hp @ 6500 RPM	141lb.ft @ 4000 RPM	6800 RPM	7000 RPM	2300 RPM	PRB
	2002 - 2005 Honda Civic Si USDM	9.8:1	160hp @ 6500 RPM	132lb.ft @ 4000 RPM	6800 RPM	7000RPM	2300 RPM	PRB
	2002 - 2005 Honda Civic Type S EDM	9.8:1	160hp @ 6500 RPM	132lb.ft @ 4000 RPM	6800 RPM	7100 RPM	2200 RPM	PRB
	2003 - 2006 Honda Civic 2.0 i-VTEC	9.8:1	155hp @ 6500 RPM	177order=flipNaNorder=flip @ 5000 RPM	6800 RPM	7000 RPM		PRB
K20A4	2002 - 2006 Honda CR-V	9.8:1	156hp @ 6500 RPM	140lb.ft @ 4000 RPM	6800 RPM			PNA
K20A6	2003 - 2006 Honda Accord	9.8:1	155hp @ 6500 RPM	140lb.ft @ 4000 RPM	6800 RPM		2500 RPM	RAA
K20A6	2003 - 2006 Honda Accord	9.8:1	155hp @ 6500 RPM	140lb.ft @ 4000 RPM	6800 RPM		2500 RPM	RAA
K20A7	2003 - 2007 Honda Accord (SEA)	9.8:1	150abbr=onNaNabbr=on @ 6000 RPM	137lb.ft @ 4500 RPM	6800 RPM			RAA
K20A9	2004-2007 Honda FR-V	9.8:1	1500NaN0 @ 6500 RPM	141.6lbft @ 4000 RPM	6800 RPM		2500 RPM	PNC

Additional notes:K20A Spec R engine (FD2 Civic Type R)

Chromoly flywheel, higher-tensile strength connecting rods, high-compression pistons, stiffer valve springs, higher-lift hollow camshafts with more duration, and 2007–2011 cylinder-head intake-port and exhaust-port surface polishing used in NSX-R.^[12] The JDM K20A type-R engine block would be removed from production assembly line by an experienced Honda engine technician to torque the connecting rod bolts to factory specification by hand using micrometer to measure connecting rod bolt stretching. Then the JDM K20A type-R engine block would be returned to the production assembly line to complete the engine building process.

K20B (i-VTEC I)

Honda K20B (i-VTEC I)
Manufacturer:	Honda Motor Co., Ltd.
Production:	2003 - 2006
Configuration:	I4
Displacement:	1998cc
Bore:	863NaN3
Stroke:	863NaN3
Valvetrain:	DOHC 4 valves x cyl w/ i-VTEC
Compression:	10.0:1
Fuelsystem:	Direct fuel injection
Management:	ECU
Fueltype:	Gasoline
Coolingsystem:	Water-cooled
Power:	156hp @ 6300 rpm
Torque:	139lb.ft @ 4600 rpm

Injection Pressure: 10MPa
Center Fuel Injection with swirl guide
Air-Fuel Ratio:
- Normal driving cycle: 65:1 (ultra-lean combustion)
- Acceleration/High load driving cycle: 14.7:1 (Stoichiometric)
Deep Piston Cavity formed in top of Pistons
Intake Manifold code: PPD
Application: 2003 - 2006 Honda Stream Absolute

K20Z (i-VTEC)

Honda K20Z (i-VTEC)
Manufacturer:	Honda Motor Co., Ltd.
Production:	2005 - 2015
Configuration:	I4
Displacement:	1998cc
Bore:	863NaN3
Stroke:	863NaN3
Valvetrain:	DOHC 4 valves x cyl w/ i-VTEC on some models
Compression:	See left for specific application.
Fuelsystem:	Fuel injection
Management:	ECU
Fueltype:	Gasoline
Coolingsystem:	Water-cooled
Power:	See left for specific application.
Torque:	See left for specific application.

Applications:

Engine	Application	Compression	Power	Torque	Redline	Rev limiter	i-VTEC engagement	Intake Manifold
K20Z1	2005 - 2006 Acura RSX Type S	11.0:1	210hp @ 7800 RPM	143lb.ft @ 6200 RPM	8100 RPM	8300 RPM	5800 RPM	PRB
K20Z1	2005 - 2006 Honda Integra Type S (/)	11.0:1	210hp @ 7800 RPM	143lb.ft @ 6200 RPM	8100 RPM	8300 RPM	5800 RPM
K20Z2	2006 - 2011 Acura CSX	9.8:1	153hp @ 6000 RPM	139lb.ft @ 4500 RPM	6800 RPM
	2006 - 2008 Honda Accord	9.8:1	153hp @ 6000 RPM	139lb.ft @ 4500 RPM	6800 RPM			RBA
	2006 - 2010 Honda Civic (SEA)	9.8:1	153hp @ 6000 RPM	139lb.ft @ 4500 RPM	6800 RPM			RTB
K20Z3	2006 - 2011 Honda Civic Si	11.0:1	197hp @ 7800 RPM	139lb.ft @ 6200 RPM	8000 RPM	8300 RPM	5800 RPM	RBC
K20Z3	2007 - 2010 Acura CSX Type S	11.0:1	197hp @ 7800 RPM	139lb.ft @ 6200 RPM	8000 RPM	8300 RPM	5800 RPM
K20Z4	2007 - 2010 Honda Civic Type R	11.0:1	201hp @ 7800 RPM	142lb.ft @ 6800 RPM	8000 RPM	8200 RPM	5400 RPM	RSP
K20Z5	2007 - 2010 Honda Civic Si	11.0:1	192hp @ 7800 RPM	136lb.ft @ 6800 RPM	8000 RPM	8200 RPM	5400 RPM

Additional notes:K20Z3 (as fitted to Ariel's Atom 3.5)

The K20Z3 has Honda's traditional performance VTEC on the intake and the exhaust cams, as found on previous generation of engines. Variable cam timing technology is included on the intake but not the exhaust cams. The added timing control corresponds to the "i" in i-VTEC.

K20C (Earth Dreams VTEC Turbo)

K20C (Earth Dreams VTEC Turbo)
Manufacturer:	Honda Motor Co., Ltd.
Production:	2015–present
Configuration:	I4
Displacement:	1996cc
Bore:	863NaN3
Stroke:	85.93NaN3
Block:	Aluminium
Head:	Aluminium
Valvetrain:	DOHC 4 valves x cyl w/ VTEC/i-VTEC
Compression:	See left for specific application.
Turbocharger:	Single
Fuelsystem:	Direct fuel injection
Management:	ECU
Fueltype:	Gasoline
Coolingsystem:	Water-cooled
Power:	See left for specific application.
Torque:	See left for specific application.

Applications:

Engine	Application	Compression	Power	Torque	Redline	Rev limiter	i-VTEC engagement
K20C1	2015 - 2017 Honda Civic Type R (EDM) 2017 - 2021 Honda Civic Type R (USDM) 2023 - present Honda Civic Type R (USDM) 2024 - present Acura Integra Type S (K20C8)	9.8:1	306– @ 6500 RPM	295– @ 2500-4000 RPM	7000 RPM	7000 RPM
K20C3	2016 - present Honda Avancier/UR-V (China)	9.8:1	268hp @ 6500 RPM	273lb.ft @ 4200 RPM			6100 RPM
K20C4	2018 - 2022 Honda Accord(Sport, EX-L & Touring 2.0T trims)	9.8:1	252hp @ 6500 RPM	273lb.ft @ 1500-4000 RPM	6800 RPM
K20C4	2019 - present Acura RDX	9.8:1	272hp @ 6500 RPM	280lb.ft @ 1600-4500 RPM	6800 RPM
K20C5	2019 - present Acura RDX (China)	9.8:1	265 hp (195 kW) @ 6500 RPM	280lb.ft @ 3000-4000 RPM	6800 RPM
K20C6	2021 - present Acura TLX	9.8:1	272 hp (203 kW) @ 6500 RPM	280 lb-ft (380 N-m) @ 1600-4500 RPM	6800 RPM

Additional notes

Earth Dreams Technology
K20C1: First Honda Type R engine to be built in the US at the Honda Anna Engine Plant in Anna, Ohio. First time Honda has used a turbocharger on the TYPE R.
K20C5: All Acura RDX sold in China (manufactured by GAC Acura)
Although the K20C4 in the Acura RDX and the K20C6 in the Acura TLX share the same internals, they are named differently due to different engine mount points to accommodate the sedan body of the TLX.
The VTEC mechanism is available only on the exhaust valves.
K20C1 engines have an offset of 8mm on the crankshaft from the centerline of the bore.^[13]
K20C8 (Acura Integra Type S): Engine is identical to the K20C1, it is named differently to accommodate different mounting points.

K20C & K20Z (Earth Dreams i-VTEC)

K20C & K20Z (Earth Dreams i-VTEC)
Manufacturer:	Honda Motor Co., Ltd.
Production:	2016–present
Configuration:	I4
Displacement:	1996cc
Bore:	863NaN3
Stroke:	85.93NaN3
Block:	Aluminium
Head:	Aluminium
Valvetrain:	DOHC 4 valves x cyl w/ i-VTEC
Compression:	See left for specific application.
Fuelsystem:	Port Injection (Multi-point Injection)
Management:	ECU
Fueltype:	Gasoline
Coolingsystem:	Water-cooled
Power:	See left for specific application.
Torque:	See left for specific application.

Applications:

Engine	Application	Compression	Power	Torque	Redline	Rev limiter	i-VTEC engagement
K20C2	2016 - 2018 Honda Civic (LX & EX) Sedan (USDM)2019–present Honda Civic (LX & Sport) Sedan (USDM) 2016–2020 Honda Civic (LX, LX-P, Sport) Coupe (USDM) 2022–2024 Honda Civic (LX, Sport) Hatchback (USDM)	10.8:1	158hp @ 6500 RPM	138lb.ft @ 4200 RPM	6700 RPM^[14]	7000 RPM	6100 RPM (Manual) 6500 RPM (CVT)
K20C2	2016 - 2023 Formula 4 United States Championship	10.8:1	158hp @ 6500 RPM	138lb.ft @ 4200 RPM	6800 RPM	7000 RPM	6100 RPM
K20Z5	2023 - present Honda HR-V ^[15]	10.8:1	158hp @ 6500 RPM	138lb.ft @ 4200 RPM	6800 RPM^[16]

K23

K23A (i-VTEC Turbo)

Honda K23A (i-VTEC Turbo)
Manufacturer:	Honda Motor Co., Ltd.
Production:	2007 - 2012
Configuration:	I4
Displacement:	2300cc
Bore:	863NaN3
Stroke:	993NaN3
Block:	Aluminium
Head:	Aluminium
Valvetrain:	DOHC 4 Valves x Cyl w/ i-VTEC
Compression:	8.8:1
Turbocharger:	1
Fuelsystem:	Fuel injection
Management:	ECU
Fueltype:	Gasoline
Coolingsystem:	Water-cooled
Power:	240hp @ 6000 RPM
Torque:	260lb.ft @ 4500 RPM

Applications:

Additional notes:

This version of the K engine uses a Mitsubishi TD04HL-15T turbocharger with a dual path turbine housing, optimizing low end response while allowing better high end flow. Maximum boost pressure is 13.5psi. The engine includes i-VTEC and VTC technologies and comes mated to a version of Honda's 5-speed automatic with SH-AWD (note: SH-AWD was standard from 2007-2009 and optional from 2010-2012).

K24

K24A (i-VTEC)

Honda K24A (i-VTEC)
Manufacturer:	Honda Motor Co., Ltd.
Production:	2001 - 2016
Configuration:	I4
Displacement:	2354cc
Bore:	873NaN3
Stroke:	993NaN3
Valvetrain:	DOHC 4 Valves x Cyl w/ i-VTEC
Compression:	See left for specific application.
Fuelsystem:	Fuel injection
Management:	ECU
Fueltype:	Gasoline
Coolingsystem:	Water-cooled
Power:	See left for specific application.
Torque:	See left for specific application.

Engine	Application	Compression	Power	Torque	Redline	Rev limiter	i-VTEC engagement	Intake Manifold
K24A (High Performance)	2002 - 2008 Honda Accord 24T, 24TL, 24S and Type-S (JDM) (CL9/CM2, FWD)	10.5:1	200PS @ 6800 rpm	232order=flipNaNorder=flip @ 4500 rpm	7100 rpm	7200 rpm	6000 rpm	RBB
	2002 - 2008 Honda Accord 24T (JDM) (CM3, AWD)	10.5:1	190PS @ 6800 rpm	228order=flipNaNorder=flip @ 4500 rpm	7100 rpm	7200 rpm	6000 rpm	RBB
	2008 - 2013 Honda Accord 24E, 24IL, 24TL and Type-S (JDM) (CU2/CW2, FWD)^[17]	11:1	206PS @ 7000 rpm	232order=flipNaNorder=flip @ 4300 rpm			5000 rpm	R40
	2003 - 2008 Honda Odyssey Absolute (JDM) (RB1, FWD)^[18]	10.5:1	200PS @ 6800 rpm	232order=flipNaNorder=flip @ 4500 rpm	7100 rpm	7200 rpm	6000 rpm	RBB
	2003 - 2008 Honda Odyssey Absolute (JDM) (RB2, AWD)	10.5:1	190PS @ 6800 rpm	228order=flipNaNorder=flip @ 4500 rpm	7100 rpm	7200 rpm	6000 rpm	RBB
	2008 - 2013 Honda Odyssey Absolute (JDM) (RB3, FWD)^[19]	11:1	206PS @ 7000 rpm	232order=flipNaNorder=flip @ 4300 rpm			5000 rpm	R40
	2008 - 2013 Honda Odyssey Absolute (JDM) (RB4, AWD)	11:1	204PS @ 7000 rpm	230order=flipNaNorder=flip @ 4300 rpm				R40
K24A (Eco)	2003 - 2005 Honda Element (JDM)^[20]	9.7:1	160PS @ 5500 rpm	218order=flipNaNorder=flip @ 4500 rpm				PZD
	2003 - 2008 Honda Odyssey (JDM)	9.7:1	160PS @ 5500 rpm	218order=flipNaNorder=flip @ 4500 rpm				RAA
	2008 - 2013 Honda Odyssey (JDM)	10:1	173PS @ 6000 rpm	222order=flipNaNorder=flip @ 4300 rpm				RAA
	2003 - 2005 Honda Stepwgn Spada 24T (JDM)	9.6:1	162PS @ 6000 rpm	220order=flipNaNorder=flip @ 3600 rpm
	2004 - 2013 Honda Elysion (JDM)^[21]	9.7:1	160PS @ 5500 rpm	218order=flipNaNorder=flip @ 4500 rpm
	2006 - 2009 Honda Edix 24S (JDM)^[22]	9.7:1	162PS @ 5700 rpm	218order=flipNaNorder=flip @ 4000 rpm
	2005 - 2006 Honda CR-V (JDM)^[23]	9.6:1	160PS @ 6000 rpm	220order=flipNaNorder=flip @ 3600 rpm	6500 rpm	7000 rpm		PPA
	2006 - 2011 Honda CR-V (JDM)^[24]	9.7:1	170PS @ 5800 rpm	220order=flipNaNorder=flip @ 4200 rpm
	2011 - 2016 Honda CR-V (JDM)^[25]	10:1	190PS @ 7000 rpm	222order=flipNaNorder=flip @ 4400 rpm
K24A1	2002 - 2006 Honda CR-V	9.6:1	160hp @ 6000 rpm	162lb.ft @ 3600 rpm	6500 rpm	7000 rpm	2750 rpm	PPA
K24A2	2004 - 2005 Acura TSX	10.5:1	200PS @ 6800 rpm	166lb.ft @ 4500 rpm	7100 rpm	7200 rpm	6000 rpm	RBB
K24A2	2006 - 2008 Acura TSX^[26]	10.5:1	205hp @ 7000 rpm	164abbr=onNaNabbr=on @ 4500 rpm	7100 rpm	7200 rpm	6000 rpm	RBB
K24A3	2003 - 2007 Honda Accord	10.5:1	190PS @ 6800 rpm	232order=flipNaNorder=flip @ 4500 rpm	7200 rpm	7300 rpm	6000 rpm	RBB
K24A3	2003 - 2007 Honda Accord Euro (/)	10.5:1	190PS @ 6800 rpm	232order=flipNaNorder=flip @ 4500 rpm	7200 rpm	7300 rpm	6000 rpm	RBB
K24A4	2003 - 2005 Honda Accord (USDM)	9.7:1	160hp @ 5500 rpm	161lb.ft @ 4500 rpm	6800 rpm		3500rpm	RAA
	2003 - 2008 Honda Odyssey	9.7:1	160hp @ 5500 rpm	161lb.ft @ 4500 rpm	6800 rpm			RAA
	2003 - 2006 Honda Element	9.7:1	160hp @ 5500 rpm	161lb.ft @ 4500 rpm	6800 rpm				PZD
K24A8	2006 - 2007 Honda Accord (USDM)	9.7:1	166hp @ 5800 rpm	160lb.ft @ 4000 rpm	6500 rpm		2400/4500 rpm	RAA
	2007 - 2011 Honda Element	9.7:1	166hp @ 5800 rpm	161lb.ft @ 4000 rpm	6800 rpm		2400/4500 rpm	PZD
	2008 - 2014 Honda Odyssey (JDM)	10.5:1	1780NaN0	218abbr=onNaNabbr=on

Additional notes:K24A2 and K24A3 (2006-2008 Acura TSX)

Increased intake flow:

- Intake valve + 1 mm oversize (Intake valve head measures 36mm, but valve seat still measures 35mm)

- Intake cam High lift lobe with 0.9 mm more lift and 12 degrees more duration

- Throttle body increased from 60–64 mm

- Radius on some intake pipes increased from 70–80 mm

Increased exhaust flow

- Exhaust Head pipe increased from 60–65 mm

- Higher flow catalytic converter

- Main (single) exhaust pipe increased from 54–57 mm

- Rear (twin) pipes increased in diameter from 42.5 to 45 mm

Block improvements:

- Additional air passages in crankcase for reduced pumping losses

Others

- Stronger connecting rods

- Under-piston oil squirters

K24Z & K24Y (i-VTEC)

Honda K24Z & K24Y (i-VTEC)
Manufacturer:	Honda Motor Co., Ltd.
Production:	2007 - 2015
Configuration:	I4
Displacement:	2354cc
Bore:	873NaN3
Stroke:	993NaN3
Valvetrain:	DOHC 4 valves x cyl w/ i-VTEC
Compression:	See left for specific application.
Fuelsystem:	Fuel injection
Management:	ECU
Fueltype:	Gasoline
Coolingsystem:	Water-cooled
Power:	See left for specific application.
Torque:	See left for specific application.

Applications:

Engine	Application	Compression	Power	Torque	Redline	Rev limiter	i-VTEC engagement
K24Z1	2007 - 2009 Honda CR-V (RE3, RE4)	9.7:1	166hp @ 5800 RPM	161lb.ft @ 4200 RPM	6500 RPM
K24Z2	2008 - 2012 Honda Accord LX/LX-P (USDM/CDM)	10.5:1	177hp @ 6500 RPM	161lb.ft @ 4300 RPM	6800 RPM		5100 RPM
K24Z2	2016 - 2020 Proton Perdana	10.5:1	177hp @ 6500 RPM	161lb.ft @ 4300 RPM	6800 RPM
K24Z3	2008 - 2012 Honda Accord LX-S/EX/EX-L (USDM/CDM)	10.5:1^[27]	190hp @ 7000 RPM	162lb.ft @ 4400 RPM	7100 RPM		5100 RPM
K24Z3	2009 - 2014 Acura TSX and Honda Accord (Europe)^[28] (CU2/CW2)	11.0:1	201hp @ 7000 RPM	172lb.ft @ 4300 RPM	7100 RPM		5100 RPM
K24Z4	2008 - 2012 Honda CR-V (RE7)	9.7:1	161hp @ 5800 RPM	161lb.ft @ 4200 RPM	6500 RPM
K24Z5	2010 - 2015 Honda Spirior	10.5:1	184hp @ 6500 RPM	164lb.ft @ 4300 RPM	6500 RPM
K24Z6	2010 - 2011 Honda CR-V (USDM/CDM)	10.5:1	180hp @ 6800 RPM	161lb.ft @ 4400 RPM	7100 RPM	7200 RPM
K24Z7	2012 - 2013 Honda Civic Si	11.0:1	201hp @ 7000 RPM	170lb.ft @ 4400 RPM	7000 RPM	7200 RPM	5200 RPM
	2014 - 2015 Honda Civic Si	11.0:1	205hp @ 7000 RPM	174lb.ft @ 4400 RPM	7000 RPM	7500 RPM	5000 RPM
	2013 - 2015 Acura ILX	11.0:1	201hp @ 7000 RPM	170lb.ft @ 4400 RPM	7100 RPM	7200 RPM
	2012 - 2014 Honda CR-V (USDM/CDM)	10.0:1	185hp @ 7000 RPM	163lb.ft @ 4400 RPM	7000 RPM	7200 RPM	5000 RPM
K24Y1	2012 - 2014 Honda CR-V (Thailand)	10.5:1	170hp @ 6000 RPM	220order=flip0order=flip @ 4300 RPM	6500 RPM
K24Y2	2012 - 2015 Honda Crosstour	10.0:1	192hp @ 7000 RPM	162lb.ft @ 4400 RPM	7100 RPM

K24W & K24V (Earth Dreams i-VTEC)

Honda K24W & K24V (Earth Dreams i-VTEC)
Manufacturer:	Honda Motor Co., Ltd.
Production:	2013 - present
Configuration:	I4
Displacement:	2356cc
Bore:	873NaN3
Stroke:	993NaN3
Valvetrain:	DOHC 4 valves x cyl w/ i-VTEC
Compression:	See left for specific application.
Fuelsystem:	See left for specific application.
Management:	ECU
Fueltype:	Gasoline
Coolingsystem:	Water-cooled
Power:	See left for specific application.
Torque:	See left for specific application.
Length:	30cm

Direct Injection, i-VTEC (intake camshaft & valvetrain)

Applications:

Engine	Application	Compression	Fuel Injection	Power	Torque	Redline	i-VTEC engagement
K24W	2013 - present Honda Odyssey (JDM)^[29]	11.1:1	Multi Point	185hp @ 6400 RPM	173lb.ft @ 4000 RPM	6800 RPM	4800 RPM
K24W1	2013 - 2017 Honda Accord (USDM)^[30]	11.1:1	Direct	185hp @ 6400 RPM	181lb.ft @ 3900 RPM	6800 RPM	4800 RPM
K24W4	2013 - 2018 Honda Accord (Thailand/Malaysia)	10.1:1	Multi Point	174hp @ 6200 RPM	225order=flipNaNorder=flip @ 4000 RPM	6500 RPM
K24W4	2013 - present Honda Odyssey (International model excl. Japan)	10.1:1	Multi Point	174hp @ 6200 RPM	225order=flipNaNorder=flip @ 4000 RPM	6500 RPM
K24W7	2015 - 2020 Acura TLX	11.6:1	Direct	206hp @ 6800 RPM	182lb.ft @ 3900 RPM	7000 RPM	5000 RPM +/-100 RPM
K24W7	2015 - 2018 Honda Spirior Si	11.6:1	Direct	202hp @ 6800 RPM	182lb.ft @ 3900 RPM	7000 RPM	5000 RPM +/-100 RPM
K24W9	2015 - 2019 Honda CR-V (USDM)^[31]	11.1:1	Direct	185hp @ 6400 RPM	181lb.ft @ 3900 RPM	6800 RPM	4800 RPM
K24V5	2015 - 2016 Honda CR-V (Thailand)	10.1:1	Multi Point	174hp @ 6200 RPM	225order=flipNaNorder=flip @ 4000 RPM	6500 RPM
K24V5	2017 - 2022 Honda CR-V (Thailand)^[32] ^[33]	10.1:1	Multi Point	170hp @ 6200 RPM	165lb.ft @ 4000 RPM	6500 RPM
K24V7	2016 - 2022 Acura ILX^[34] ^[35]	11.6:1	Direct	201hp @ 6800 RPM	180lb.ft @ 3800 RPM	7000 RPM	5000 RPM +/-100 RPM

External links

Honda engine pages: i-VTEC DOHC, 2.0L DOHC i-VTEC
K Series VTEC Breakdown: K Series VTEC Breakdown

Notes and References

Web site: Honda K-Series Engines . JDM Spec Engines . 20 May 2014 . 13 March 2014 . https://web.archive.org/web/20140313021436/http://www.jdmspecengines.com/honda-engines/k-series.html . live .
Web site: Civic Type R K20C1 Engine. Engine Builder Mag. 23 June 2023.
Web site: Honda｜ストリーム（2005年12月終了モデル）｜スペック. www.honda.co.jp. 2021-03-30. 2016-09-24. https://web.archive.org/web/20160924092108/http://www.honda.co.jp/auto-archive/stream/2005/grade-data/. live.
Web site: Honda｜インテグラ（2006年9月終了モデル）｜スペック. www.honda.co.jp. 2021-03-30. 2017-10-27. https://web.archive.org/web/20171027084242/http://www.honda.co.jp/auto-archive/integra/3door/2006/grade-data/. live.
Web site: Honda｜ステップワゴン（2005年4月終了モデル）. www.honda.co.jp. 2021-03-30. 2016-06-21. https://web.archive.org/web/20160621090553/http://www.honda.co.jp/auto-archive/stepwgn/normal/2005/syogen.html. live.
Web site: Honda｜ステップワゴンスパーダ（2005年4月終了モデル）. www.honda.co.jp. 2021-03-30. 2017-09-23. https://web.archive.org/web/20170923154837/http://www.honda.co.jp/auto-archive/stepwgn/spada/2005/shogen.html. live.
Web site: Honda｜ステップワゴン（2006年4月終了モデル）｜スペック. www.honda.co.jp. 2021-03-30. 2014-12-27. https://web.archive.org/web/20141227190246/http://www.honda.co.jp/auto-archive/stepwgn/normal/2006/grade-data/. live.
Web site: Honda｜アコード（2008年11月終了モデル）｜スペック. www.honda.co.jp. 2021-03-30. 2016-06-22. https://web.archive.org/web/20160622030602/http://www.honda.co.jp/auto-archive/accord/4door/2008/grade-data/. live.
Web site: Honda｜エディックス（2005年11月終了モデル）｜スペック. www.honda.co.jp. 2021-03-30. 2016-07-01. https://web.archive.org/web/20160701224139/http://www.honda.co.jp/auto-archive/edix/2005/grade-data/. live.
Web site: Honda｜シビック（2007年8月終了モデル）｜スペック. www.honda.co.jp. 2021-03-30. 2017-05-18. https://web.archive.org/web/20170518233353/http://www.honda.co.jp/auto-archive/civic/4door/2007/grade-data/. live.
Web site: Technical Information RSX VTEC and VTC . Hondata . 21 April 2018 . 12 May 2018 . https://web.archive.org/web/20180512044015/https://www.hondata.com/tech-rsx-vtec-vtc . live .
Web site: Honda K20A 2.0l DOHC i-VTEC SPEC R Engine for the new FD2 CIVIC TYPE R. Asia.vtec.net. 15 October 2018. 6 February 2017. https://web.archive.org/web/20170206140244/http://asia.vtec.net/Engines/FD2K20AR/index.html. live.
Web site: Civic Type R K20C1 Engine. Engine Builder Mag. 23 June 2023.
Web site: Vehicle Specifications - 2018 Honda Civic Sedan - Honda Owners Site. Owners.honda.com. 15 October 2018. 5 November 2018. https://web.archive.org/web/20181105012522/http://owners.honda.com/vehicles/information/2018/Civic-Sedan/specs#mid%5EFC2E5JEW. live.
Web site: The 2023 HR-V has shown up at a few dealers already. What we know so far . Temple of VTEC . June 6, 2022 . June 26, 2022.
Web site: 2023 Honda HR-V Specifications & Features . American Honda Motor Co., Inc . June 7, 2022 . June 26, 2022.
Web site: Honda│アコード（2013年3月終了モデル）│スペック. www.honda.co.jp. 2021-03-30. 2016-09-13. https://web.archive.org/web/20160913124640/http://www.honda.co.jp/auto-archive/accord/4door/2013/webcatalog/spec/. live.
Web site: Honda｜オデッセイ（2007年1月終了モデル）｜スペック. www.honda.co.jp. 2021-03-30. 2016-07-28. https://web.archive.org/web/20160728150305/http://www.honda.co.jp/auto-archive/odyssey/2007_01/grade-data/. live.
Web site: Honda│オデッセイ（2013年9月終了モデル）│スペック. www.honda.co.jp. 2021-03-30. 2018-07-07. https://web.archive.org/web/20180707154442/http://www.honda.co.jp/auto-archive/odyssey/2013/webcatalog/spec/. live.
Web site: Honda｜エレメント（2005年5月終了モデル）. www.honda.co.jp. 2021-03-30. 2017-06-12. https://web.archive.org/web/20170612115559/http://www.honda.co.jp/auto-archive/element/2005-1/shogen.html. live.
Web site: Honda｜エリシオン（2005年8月終了モデル）. www.honda.co.jp. 2021-03-30. 2018-07-13. https://web.archive.org/web/20180713033707/http://www.honda.co.jp/auto-archive/elysion/normal/2005/shogen.html. live.
Web site: Honda｜エディックス（2009年8月終了モデル）│Webカタログ│スペック（諸元表）. www.honda.co.jp. 2021-03-30. 2017-11-13. https://web.archive.org/web/20171113221431/http://www.honda.co.jp/auto-archive/edix/2009/webcatalogue/spec/. live.
Web site: Honda｜CR-V（2006年9月終了モデル）｜スペック. www.honda.co.jp. 2021-03-30. 2021-04-23. https://web.archive.org/web/20210423071058/https://www.honda.co.jp/auto-archive/cr-v/2006/grade-data/. live.
Web site: Honda｜CR-V（2007年8月終了モデル）｜スペック. www.honda.co.jp. 2021-03-30. 2021-04-23. https://web.archive.org/web/20210423071037/https://www.honda.co.jp/auto-archive/cr-v/2007/grade-data/. live.
Web site: 性能 | CR-V（2016年8月終了モデル） | Honda. www.honda.co.jp. 2021-03-30. 2019-07-29. https://web.archive.org/web/20190729005940/https://www.honda.co.jp/auto-archive/cr-v/2016/webcatalog/driving/. live.
Web site: 2008 Acura TSX - Powertrain. acuranews.com. 15 October 2018. 15 October 2018. https://web.archive.org/web/20181015231618/http://www.acuranews.com/channels/acura-automobiles/archive/2007/releases/2008-acura-tsx-powertrain. dead.
Web site: 2011-08-17. 2012 Honda Accord Specifications and Features. 2020-10-03. Honda Automobiles Newsroom. en. 2021-04-23. https://web.archive.org/web/20210423071022/https://hondanews.com/en-US/honda-automobiles/releases/2012-honda-accord-specifications-and-features. live.
20 April 2008 . 2009 Acura TSX - Powertrain . Torrance, CA . Acura . 1 September 2015.
Web site: Odyssey Specification List. Honda. 9 June 2023. ja.
Web site: 2016 Honda ACCORD (2.4L 4 -cyl Engine Code K24W1 7) Motor Oil, Filters and Lubricants - AMSOIL. 9 June 2023.
Web site: 2019 Honda CR-V (2.4L 4 -cyl Engine Code K24W9 K) Motor Oil, Filters and Lubricants - AMSOIL. 9 June 2023.
Web site: ECO sticker - Honda CR-V 2.4 EL 4WD. ECO sticker - The Office of Industrial Economics, Ministry of Industry Thailand. th-th. 2020-01-18. 2020-09-27. https://web.archive.org/web/20200927070737/http://www.car.go.th//api/render/tagImageEcoA4grayCT/948bc8e2d516447aa18935b59ef65b30. live.
Web site: Honda CR-V Catalogue. Honda Thailand. th-th. 2020-01-18.
Acura Set to Launch More Powerful, Technologically Advanced and Luxuriously Equipped 2016 Acura ILX Sport Sedan. 20 November 2014. Acura. Los Angeles, CA. 23 May 2016. 27 September 2020. https://web.archive.org/web/20200927070736/https://www.acura.com/news-and-press/press-release-detail?article=8207-en. live.
Web site: 2017 ILX Specifications & Features. 12 April 2016. Acura. 23 May 2016. 27 September 2020. https://web.archive.org/web/20200927070738/https://www.acura.com/news-and-press/press-release-detail?article=8945-en. live.