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| BMW M20 engine | |
|---|---|
 | |
| Overview | |
| Production | 1977–1993 |
| Layout | |
| Configuration | Straight-6 |
| Displacement | 2.0 L (1,991 cc) 2.3 L (2,316 cc) 2.5 L (2,494 cc) 2.7 L (2,693 cc) |
| Cylinder bore | 80 mm (3.15 in) 84 mm (3.31 in) |
| Piston stroke | 66 mm (2.60 in) 75 mm (2.95 in) 76.8 mm (3.02 in) 81 mm (3.19 in) |
| Cylinder block material | Cast iron |
| Cylinder head material | Aluminium |
| Valvetrain | SOHC |
| Combustion | |
| Fuel type | Petrol |
| Chronology | |
| Predecessor | None |
| Successor | BMW M50 |
The BMW M20 is a SOHC straight-six petrol engine which was produced from 1977 to 1993. It was introduced eight years after the larger BMW M30 straight-six engine, which remained in production alongside the M20.[1]
The first cars to use the M20 were the E12 5 Series and the E21 3 Series. The initial M20 model had a displacement of 2.0 L (122 cu in), with later versions having displacements of up to 2.7 L (165 cu in).[2]
The M20 began to be phased out following the introduction of the M50 engine in 1990. The final M20 engines were fitted to the E30 3 Series wagon (estate) and convertible model built in April 1993.[3]
The M20 was the basis for the BMW M21 diesel engine.[4] It is also loosely related to the BMW M70 V12 petrol engine.
- ^ "BMW M30". www.bmw-tech.org. Retrieved 2 December 2017.
- ^ "Engine Of The Day: BMW M20". www.jalopnik.com. 29 August 2009. Retrieved 18 September 2017.
- ^ "BMW 3 Series Touring (E30) (1988 - 1993)". autoevolution.
- ^ "Archived copy". Archived from the original on 2012-01-05. Retrieved 2012-06-05.
{{cite web}}: CS1 maint: archived copy as title (link)