BMW S65
The BMW S65 is a naturally aspirated V8 petrol engine which was produced from 2007 to 2013. Its main use was in the BMW M3 (where it replaced the BMW S54 straight-six engine). There is no direct replacement for the S65, since the following generation of M3 switched to a turbocharged straight-six engine (the BMW S55).
| BMW S65 engine | |
|---|---|
S65B40 in a E93 M3 | |
| Overview | |
| Manufacturer | BMW |
| Production | 2007–2013 |
| Layout | |
| Configuration | 90° V8 |
| Displacement | 4.0 L (3,999 cc) 4.4 L (4,361 cc) |
| Cylinder bore | 92 mm (3.62 in) |
| Piston stroke | 75.2 mm (2.96 in) 82 mm (3.2 in) |
| Cylinder block material | Aluminium |
| Cylinder head material | Aluminium |
| Valvetrain | DOHC w/ VVT |
| Combustion | |
| Fuel system | Electronic multi-point fuel injection |
| Fuel type | Petrol |
| Chronology | |
| Predecessor | BMW S62 |
| Successor | BMW S63 |
Derived from the BMW S85 V10 engine (as used in the E60 M5), the S65 shares the same basic architecture and aluminium construction. Unlike most other BMW M engines, the S65 and S85 are not related to a regular production BMW engine.
The S65 won the International Engine of the Year award for the 3.0 to 4.0 L category in 2008, 2009, 2010, 2011 and 2012.
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