Hyundai Tau engine explained

τ-engine ^Tau engine
Manufacturer:	Hyundai Motor Company
Production:	2008–2021
Predecessor:	Omega
Configuration:	90° V8
Block:	High pressure die cast aluminum
Head:	Aluminum
Valvetrain:	DOHC 4 valves x cyl. with D-CVVT
Displacement:	4627cc 5038cc
Bore:	92mm 96mm
Stroke:	87mm
Fueltype:	Gasoline
Fuelsystem:	Multi-port fuel injection Direct injection
Coolingsystem:	Water-cooled
Compression:	10.4:1, 11.5:1, 11.8:1
Power:	NaN0NaN0
Torque:	NaNkgm

The Tau τ is a family of gasoline V8 engines produced by the Hyundai Motor Company. It replaced the Omega engine line.

Tau MPi

Petrol engines!Model!!Engine code!!Power@rpm!!Torque@rpm!!Compression ratio

4.6 Tau MPi (366PS)	G8BA	3660NaN0 @ 6500	44.8kgm @ 3500	10.4:1
4.6 Tau MPi (390PS)	G8BA	3830NaN0 @ 6500 (Regular) 3900NaN0 @ 6500 (Premium)	44.8kgm @ 3500 (Regular) 46kgm @ 3500 (Premium)
5.0 Tau MPi	G8BB	Premium fuel: 4000NaN0 @ 6400	51kgm @ 3500

Specifications

4.6 Tau MPi^[1] for the Genesis' 4.6L Tau V8 engine:

• Displacement (bore x stroke): 4627cc (NaNmm)^[2]

• Block material: High pressure die casting aluminum block

• Cylinder head material: Aluminum

• Valvetrain: Dual Over Head Cam (DOHC)

• Valve timing: Continuous variable valve timing

• Variable induction system

• Fuel delivery: Multi-port fuel injection

• Recommended fuel: Premium Unleaded, though it can run safely on regular gasoline with reduced performance

Application

4.6 Tau MPi

• 2008–2009 Kia Mohave/Borrego
• 2008–2012 Hyundai Genesis
• 2009–2011 Hyundai Equus

Hyundai Motor Company has also shown a supercharged version of the 4.6 Tau MPi engine at 2008 SEMA show,^[3] and later 2009 Chicago Auto Show. This engine was equipped with a supercharger and cylinder deactivation technology to produce an estimated 460hp while returning better fuel economy.^[4]

Tau GDi

First version (2012–2014)

The Tau GDi uses gasoline direct injection.

Petrol engines!Model!!Engine code!!Power@rpm!!Torque@rpm!!Compression ratio

5.0 Tau GDi

G8BE

4300NaN0 @ 6400 (Regular) 4350NaN0 @ 6400 (Premium)

52kgm @ 5000

11.5:1

Specifications

5.0 Tau GDi^[5] for Equus' 5.0L Tau V8 engine:

• Horsepower: 429hp

• Torque: 52kgm

• Displacement (bore x stroke): 5038cc (NaNmm)

• Compression ratio: 11.5:1

• Block material: High pressure die casting aluminum block

• Cylinder head material: Aluminum

• Valvetrain: Dual Over Head Cam (DOHC)

• Valve timing: Dual-Continuous variable valve timing(D-CVVT)

• Variable induction system

• Fuel delivery: Gasoline direct injection / Electronic fuel injection

• Recommended fuel: Premium Unleaded, though it can run safely on regular gasoline with reduced performance

Current version (2015–2021)

Updates to the 2015 Genesis 5.0 Tau V8 included: ^[6]

• Bump in compression ratio from 11.5:1 to 11.8:1
• Optimized intake runner length
• Enhanced timing chain for reduced friction and NVH
• Low-torque exhaust manifold
• Upgraded multiple-injection mapping
• Dual Continuously Variable Valve Timing (D-CVVT), a tuned variable induction system, and low-friction coatings on piston skirts
• Improved Low-end response along with better efficiency and NVH

Application

• 2016–2020 Genesis G80 (DH)
• 2015–2021 Genesis G90 (HI)
• 2011–2015 Hyundai Equus (VI)
• 2011–2016 Hyundai Genesis
• 2012–2021 Kia K9

Awards

The 4.6 Tau V8 Engine was named to the Wards 10 Best Engine Awards for 2009 and 2010.^[7] The Tau V8 received the award due to the engine's "velvety power delivery, competitive performance, and attainable price-- all of which epitomize the Korean auto maker's drive for world-class engineering", as quoted by Forbes. This was Hyundai Motor Co. Ltd. first appearance on Ward's 10 Best Engines list. The 5.0 Tau Engine was also named in the same awards for 2011.

See also

• List of Hyundai engines

Notes and References

1. Web site: 2009 Hyundai Genesis Specs. JB car pages. 2008-08-22. 2019-01-25. https://web.archive.org/web/20190125130910/http://www.jbcarpages.com/hyundai/genesis/2009/specs/. live.
2. News: Ponticel . Patrick . Hyundai V8 for Genesis is first in the family . Automotive Engineering International . 116 . 5 . 30 . May 2008.
3. Web site: SEMA 2008: Hyundai debuts tuned Genesis Sedans, 460-hp supercharged V8. Autoblog. 2008-11-04. 2012-08-09. 2013-05-05. https://web.archive.org/web/20130505185207/http://www.autoblog.com/2008/11/04/sema-2008-hyundai-debuts-tuned-genesis-sedans-460-hp-superchar/. live.
4. Web site: Hyundai Shows Off 460 HP Prototype Supercharged Tau V8. Jalopnik. 2009-02-12. 2012-08-09. 2013-06-26. https://web.archive.org/web/20130626073213/http://jalopnik.com/5152215/hyundai-shows-off-460-hp-prototype-supercharged-tau-v8. live.
5. Web site: Take that Mustang?Hyundai develops 429-hp 5.0-Liter Tau V8,Will Hook It To Eight Speed Auto. Car and Driver. 2010-06-24. 2010-06-26. https://web.archive.org/web/20100626045147/http://blog.caranddriver.com/take-that-mustang-hyundai-develops-429-hp-5-0-liter-tau-v-8-will-hook-it-to-eight-speed-auto/. dead.
6. Web site: 2015 Hyundai Genesis stiffer, quieter thanks to re-engineered chassis, body structure, powertrain - SAE International. articles.sae.org. 2016-04-25. 2014-09-03. https://web.archive.org/web/20140903194517/http://articles.sae.org/12741/. live.
7. Web site: Tau V8 Award . CubicCapacity.com . 2010-02-19 . dead . https://web.archive.org/web/20090501194555/http://www.cubiccapacity.com/hyundai-46-l-tau-engine-announced-best-v8-engine-of-the-year-by-wards/ . 2009-05-01 .