BMW automotive engine families listed as S65. Specifications below retain the source's separate family and variant labels.
Family specifications
BMW S65 Engine
| Field | Reported value |
|---|---|
| Manufacturer | BMW |
| Production | 2007–2013 |
| 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 |
| Fuel system | Electronic multi-point fuel injection |
| Fuel type | Petrol |
| Oil system | Wet sump |
| Predecessor | BMW S54 (in E46 M3 ) |
| Successor | BMW S55 (in F80 M3 ) |
Variant specifications
Versions
| Engine | Displacement | Power | Torque | Year |
|---|---|---|---|---|
| S65B40 | 3,999 cc (244.0 cu in) | 309 kW (420 PS; 414 hp) at 8,300 rpm | 400 N⋅m (295 lb⋅ft) at 3,900 rpm | 2007 |
| S65B44 | 4,361 cc (266.1 cu in) | 331 kW (450 PS; 444 hp) at 8,300 rpm | 440 N⋅m (325 lb⋅ft) at 3,750 rpm | 2010 |
Recorded vehicle applications
S65B40
- 2008-2013 BMW E90/92/93 M3
- 2009-2014 Wiesmann MF4-S
S65B44
- 2010-2011 BMW E92 M3 GTS
- 2011-2012 BMW E90 M3 CRT sedan
P65B40
- 2008 BMW M3 ALMS
- 2009 BMW M3 GT2 racing car
P65B44
- 2010-2015 BMW Z4 GT3 racing car
- 2013-2016 BMW Z4 GTE racing car
BMW automotive engine directory
Design, development and variant notes
The S65 V8 shares its basic architecture and cylinder dimensions with the S85 V10. It has individual throttles, double-VANOS, ionic-current knock sensing and Siemens MSS60 management.
Wikipedia gives an 8,400 rpm redline for the design described. S65B44 is the longer-stroke derivative; the P65 is a racing engine.
Variant dimensions and compression
These values are associated with the named variant and source qualifier; equipment and market specifications can differ. A dash means the value is not listed here.
| Variant | Bore (mm) | Stroke (mm) | Compression ratio | Source qualifier |
|---|---|---|---|---|
| S65B40 | 92 | 75.2 | 12.0:1 | — |
| S65B44 | — | 82 | — | Longer-stroke version |
Data adapted from the cited Wikipedia revision by Wikipedia contributors under CC BY-SA 4.0. Production dates and fitments reflect that revision; verify the exact engine code, market and vehicle before applying a specification.
Sources
Curated reference notes. Applicability follows the cited sources; hardware testing by this wiki is not implied.
- Wikipedia: List of BMW engines. Wikipedia contributors; CC BY-SA 4.0. Source revision oldid 1382309748; accessed 2026-11-10.
- Wikipedia: BMW S65. Wikipedia contributors; CC BY-SA 4.0. Source revision oldid 1352026974; accessed 2026-11-10.