| BMW N55 | |
|---|---|
 | |
| Overview | |
| Production | 2009–2021 |
| Layout | |
| Configuration | Straight-6 |
| Displacement | 3.0 L (2,979 cc) |
| Cylinder bore | 84 mm (3.3 in) |
| Piston stroke | 89.6 mm (3.5 in) |
| Cylinder block material | Aluminium |
| Cylinder head material | Aluminium |
| Valvetrain | DOHC, with VVT & VVL |
| Valvetrain drive system | Chain |
| Compression ratio | 10.2:1 |
| RPM range | |
| Max. engine speed | 7,000 RPM |
| Combustion | |
| Turbocharger | Single BorgWarner twin-scroll with Intercooler |
| Management | Bosch MEVD 17.2 |
| Fuel type | Petrol |
| Chronology | |
| Predecessor | BMW N54 |
| Successor | BMW B58 |
The BMW N55 is a turbocharged straight-six petrol (gasoline) engine that began production in 2009. The N55 replaced the BMW N54 engine and was introduced in the F07 5 Series Gran Turismo.
The N55 was BMW's first straight-six engine to use a twin-scroll turbocharger. It also won three straight Ward's 10 Best Engines awards in 2011–2013.[1]
Following the introduction of the BMW B58 engine in 2015, the N55 began to be phased out.[2]
The BMW S55 engine is a high performance version of the N55 made by BMW M GmbH, which is used by the F80 M3, F82 M4 and F87 M2 Competition/CS.
- ^ "Ward's 10 Best Engines Winners, 1995–2012". wardsintelligence.informa.com. 5 January 2012. Archived from the original on 11 March 2012. Retrieved 21 December 2021.
- ^ "BMW University Technical Training- B58 Engine" (PDF). Bimmerfile.com.