| Nissan SR engine | |
| Manufacturer: | Nissan (Nissan Techno) |
| Production: | 1989 - 2002 |
| Configuration: | Inline-four engine |
| Valvetrain: | DOHC 4 valves x cyl. with VVT (some versions) |
| Displacement: | 1596cc 1838cc 1998cc |
| Bore: | 82.5mm 86mm |
| Stroke: | 68.7mm 86mm |
| Block: | Aluminum[1] |
| Head: | Aluminum |
| Compression: | 9.0:1, 9.5:1, 10.3:1, 11.0:1 |
| Power: | From 1100NaN0 to 3200NaN0 |
| Torque: | From 1500NaN0 to 4180NaN0 |
| Predecessor: | Nissan CA engine |
| Successor: | Nissan QG engine Nissan QR engine Nissan MR engine |
| Fueltype: | Gasoline |
| Fuelsystem: | Fuel injection |
| Coolingsystem: | Water-cooled |
| Turbocharger: | Garrett T25G or T28 (some versions) |
The SR engine is a series of 1596cc, 1838cc or 1998cc straight-four, four-stroke gasoline engines manufactured by Nissan. It has an aluminium head and block with steel sleeves and has a DOHC 4-valve design, with variable valve timing on select models. It was added to a new engine family name PLASMA (Powerful ＆ Economic, Lightweight, Accurate, Silent, Mighty, Advanced).
The engine was used in many small to medium Nissan vehicles, including high-performance turbocharged variants. It was designed by Nissan as a replacement of the earlier CA series of engines, and was replaced by the QR and MR series of engines. Power outputs are shown under JIS Net PS or ECE Net kilowatts unless otherwise indicated.
The 1596cc SR16VE has Nissan's Neo VVL variable valve timing with lift control. It produces 1750NaN0 at 7800 rpm and 1190NaN0 at 7200 rpm. Redline is at 8300 rpm.Bore and stroke is NaNmm with a 11.0:1 compression ratio.
This engine was never used on the USDM counterpart of the B14 Lucino, the B14 Nissan 200SX, as it uses the 1.6 L GA16DE and 2.0 L SR20DE engines instead.
It is used in the following vehicles:
This version was used in the limited-production Pulsar VZ-R N1, produced from 1997 to 1998. These cars were tuned by Autech Japan. It made 2000NaN0 at 7800 rpm and 1340NaN0 at 7600 rpm. Redline of the N1 Version 2 (1998) is at 8600 rpm. This is also claimed to be the most powerful production 1.6 L naturally aspirated engine.
The SR18Di is a 1838cc DOHC engine. It produces 1100NaN0 at 6500 rpm and 1500NaN0 at 4000 rpm. Based on the Single Point Fuel Injection system, it was installed on JDM cars and some UK versions. This model used some cast iron blocks and it was used on the P10 generation Nissan Primera, but due to the low overall power this engine option was dropped on the next generation.
This engine was never used on the USDM counterpart of the P10/11 Primera, the Infiniti G20, as it uses the 2.0 L SR20DE engine instead.
It is used in the following vehicles:
The SR18DE is a 1838cc DOHC engine. It produces 1250NaN0 at 6000 rpm and 1560NaN0 at 4800 rpm. This engine came with Multi Point Fuel Injection System ECCS (Electronic Concentrated Control System). The SR18DE crankshaft was produced with four fewer counterweights than the SR20DE variants, which have eight, for lighter weight and better fuel efficiency. These lightweight crankshafts were also homologated for use in the Japanese N2 Silvia racing program and later used in the SR20VE engine.
This engine was never used on the USDM counterpart of the P10/11 Primera, the Infiniti G20, as it uses the 2.0 L SR20DE engine instead.
It is used in the following vehicles:
The SR20Di is a 1998cc DOHC engine. It produces 1160NaN0. Bore and stroke are NaNmm. Similar to the 1.8 liter version except for bigger displacement with a throttle body injection system.
This engine was never used on the USDM counterpart of the P10/11 Primera, the Infiniti G20, as it uses the 2.0 L SR20DE engine instead.
It is used in the following vehicles:
The SR20DE is a 1998cc DOHC engine. It was used in over 15 Nissan models, first appearing in the U12 Bluebird on October 1989. It was gradually phased out over time with the introduction of the low-emissions QR engine family in 2000, until production stopped in 2002. It carried nominal power ratings between NaN0NaN0 from the factory, although there are some Autech models with horsepower ratings of between 175 and 200 hp depending on the chassis and degrees of tuning.
The breakdown of the engine code is as follows:
This engine has the following specifications (SAE, 1991):
| Type: | Water cooled, 4 cycle in-line 4 cylinder | |
| Combustion Chamber: | Cross flow, pentroof type | |
| Valve mechanism: | DOHC, 4 valves per cylinder, chain drive | |
| Displacement: | 19981NaN1 | |
| Bore x Stroke: | NaNmm | |
| Bore Pitch: | 97mm | |
| Block Height: | 211.3mm | |
| Compression ratio: | 10.0:1 | |
| Crankshaft journal diameter: | 55mm | |
| Crankpin diameter: | 48mm | |
| Con rod length: | 136.3mm | |
| Valve diameters: | Intake: 34mm, Exhaust: 30mm | |
| Dimensions: | 685mm x 610mm x 615mm | |
| Power: | 1450NaN0 at 6400 rpm (SAE net) | |
| Maximum torque: | 1320NaN0 at 4800 rpm (SAE net) |
It is used in the following vehicles:
| Model | Years Produced |
|---|---|
| 180SX | 1991–1992, 1994–1998 |
| 200SX SE-R | 1995–1998 |
| Almera | 1996–1999 |
| Almera Tino | 1998–2006 |
| Avenir | 1990, 1992–1995, 1997–2001 |
| Bluebird | 1989, 1991–1993, 1995–1998, 1999–2007 |
| Liberty | 1998–2000 |
| Infiniti G20 | 1991–2002 |
| NX2000 | 1991–1996 |
| Prairie Joy | 1995–1997 |
| Presea | 1990–1993, 1995, 1997–1998 |
| Primera | 1990–2002 |
| Pulsar | 1991–2000 |
| R'nessa | 1997–1998, 2000 |
| Rasheen | 1998 |
| Sentra | 1991–1994, 1998–2001 |
| Serena | 1991–1995, 1997–2000 |
| Silvia | 1991–1993, 1995–1996, 1998–2002 |
| Wingroad | 1996–1999 |
| Tommykaira ZZ (first generation) | 1996–2001 |
See main article: Nissan SR20DET.
The SR20DET is a 1998cc DOHC engine. It is a turbocharged version of the SR20DE, with power outputs ranging from 2040NaN0 at 6000 rpm to 2500NaN0 at 6400 rpm, and torque outputs ranging from 2660NaN0 at 4800 rpm to 2800NaN0 at 4800 rpm. It was first used in the U12 Bluebird SSS ATTESA Limited from October 1989, and expanded to several cars from 1989 through 2002. The Silvia was the longest-running Nissan model to use this engine, starting with the S13 series in 1991 and ending with the S15 series in 2002. This engine was replaced with the QR20DE engine in most applications.
It is used in the following vehicles:
The 1998cc SR20VE has Nissan's Neo VVL variable valve timing with lift control. It produces 1900NaN0 at 7000 rpm and 200NaN0 at 6000 rpm with a 10.3:1 compression ratio and later (2001–2003) 2040NaN0 at 7200 rpm and 210NaN0 at 5200 rpm with a 11:1 compression ratio.
This engine was never used on the USDM counterpart of the P11 Primera, the Infiniti G20, as it uses the 2.0 L SR20DE engine instead.
It is used in the following vehicles:
The 1998cc SR20VET was the first turbocharged engine from Nissan with variable valve lift (VVL), produced exclusively for the Japanese market. It produces 2800NaN0 at 6400 rpm and 3090NaN0 at 3200 rpm, with 9.0:1 compression ratio.
It is used in the following vehicles:
| Manufacturer | Type | Duration [°] | Lift [mm] | Engine Notes | |
|---|---|---|---|---|---|
| Nissan | Intake | 232 | 8.66 | Stock low-port SR20DE (1985-2012) | |
| Nissan | Intake | 248 | 10.00 | Stock high-port SR20DE (1991-1993) | |
| Nissan | Exhaust | 240 | 9.2 | Stock Pulsar GTi-R (specific) SR20DET | |
| Nissan | Intake | 240 | 10.0 | Stock Pulsar GTi-R (specific) SR20DET | |
| Nissan | Exhaust | 248 | 10.0 | Stock Pulsar GTi-R (specific) SR20DET | |
| Nissan | Intake | 232 | 10.0 | Stock Roller Rocker SR20DE (2000-up) | |
| Nissan | Exhaust | 240 | 9.2 | Stock Roller Rocker SR20DE (2000-up) |