BMW S14
The BMW S14 is a DOHC four-cylinder petrol engine which was used in the E30 M3, E30 320iS, and E36 318i Super Touring. It is based on the BMW M10 block and the cylinder head from the six-cylinder BMW S38 with two cylinders removed. The direct successor to the S14 was the S42 based on the M42 engine. The S42 was a racing engine installed in the E36 320i for the German Super Tourenwagen Cup. There is no direct successor to the S14 for production BMWs, since the following generation of M3 is powered by the BMW S50 six-cylinder engine.
| BMW S14 | |
|---|---|
| Overview | |
| Production | 1986-1991 |
| Layout | |
| Configuration | Inline-4 |
| Displacement | 2.0 L (1,990 cc) 2.3 L (2,302 cc) 2.5 L (2,467 cc) |
| Cylinder bore | 93.4 mm (3.68 in) 95 mm (3.74 in) |
| Piston stroke | 72.6 mm (2.86 in) 84 mm (3.31 in) 87 mm (3.43 in) |
| Cylinder block material | Cast iron |
| Cylinder head material | Aluminium |
| Valvetrain | DOHC |
| Combustion | |
| Fuel type | Petrol |
| Chronology | |
| Predecessor | None |
| Successor | None |
Two separate throttle bodies are used, each incorporating two throttle butterfly plates.
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