Mercedes-Benz M256 engine
The Mercedes-Benz M256 engine is a turbocharged straight-six engine produced since 2017, when it was first introduced on the W222 S450. It replaces the previous M276 V6 engine, and is Mercedes' first straight-six engine since the M104 engine.
| Mercedes-Benz M256 | |
|---|---|
| Overview | |
| Manufacturer | Mercedes-Benz |
| Production | 2017–present |
| Layout | |
| Configuration | Straight-six |
| Displacement | 2.5 L (2,498 cc) 3.0 L (2,999 cc) |
| Cylinder bore | 83 mm (3.27 in) |
| Piston stroke | 92.4 mm (3.64 in) |
| Cylinder block material | Aluminium alloy |
| Cylinder head material | Aluminium alloy |
| Valvetrain | DOHC 4 valves x cyl |
| Compression ratio | 10.5:1 |
| Combustion | |
| Supercharger | BorgWarner eBooster |
| Turbocharger | Single-turbo twin-scroll |
| Fuel system | Direct injection |
| Fuel type | Petrol |
| Cooling system | Water cooled |
| Output | |
| Power output | 270–320 kW (367–435 PS) |
| Torque output | 500–520 N⋅m (369–384 lb⋅ft) |
| Chronology | |
| Predecessor | Mercedes-Benz M276 |
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