Mercedes-Benz M256 engine
Mercedes-Benz M256 | |
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Overview | |
Manufacturer | Mercedes-Benz |
Production | 2017– |
Layout | |
Configuration | Straight-six engine |
Displacement | 3.0 L (2,999 cc) |
Cylinder bore | 83.0 mm |
Piston stroke | 92.4 mm |
Cylinder block alloy | Aluminium alloy |
Cylinder head alloy | Aluminium alloy |
Valvetrain | DOHC |
Compression ratio | 10.5:1 |
Combustion | |
Turbocharger | Single-turbo |
Fuel system | Direct injection |
Fuel type | Petrol |
Chronology | |
Predecessor | Mercedes-Benz M276 engine |
The Mercedes-Benz M256 engine is a turbocharged straight-six engine produced since 2017, when it was first introduced on the W222 S450.[1] It replaces the previous M276 V6 engine.[2]
Design
The M256 shares a modular design with other inline-four and V8 engines, which are all 500cc per cylinder.[3] It uses an aluminium alloy block with dual overhead camshafts and has four valves per cylinder.[4] The M256 uses a 48V electrical system to operate a BorgWarner electric auxiliary compressor,[5] which can spin up to 70,000 rpm to reduce turbo lag.[6] An integrated starter alternator also provides up to 16 kW (22 PS) and 220 N⋅m (162 lb⋅ft) of boost, and replaces the drive belts by managing the water pump and air conditioning; allowing for a smaller and lighter engine.[7]
Models
Engine output excluding the additional 48V system boost:
Engine | Power | Torque | Years |
---|---|---|---|
M256 E30 DEH LA GR |
270 kW (367 PS) @ 5,500–6,100 rpm |
500 N⋅m (369 lb⋅ft) @ 1,600–4,000 rpm |
2017– |
M256 E30 DEH LA G |
320 kW (435 PS) @ 5,900–6,100 rpm |
520 N⋅m (384 lb⋅ft) @ 1,800–5,500 rpm |
M256 E30 DEH GA GR
- 2017–present W222 S450 (European models only)[8]
- 2018–present C257 CLS450[9]
M256 E30 DEH LA G
- 2017–present W222 S500[10]
- 2018–present W213 E53 4MATIC+[11]
- 2018–present C257 CLS53 4MATIC+[12]
- 2018–present X290 AMG GT 53 4MATIC+[13]
References
- ↑ "2018 Mercedes-Benz S500 European-Spec First Drive: Ice, Ice Baby. Too Cool, Too Cool". MotorTrend. Retrieved 2018-07-03.
- ↑ "Mercedes To Phase Out V6 Engines In Favor Of Straight-Sixes". Motor1.com. Retrieved 2018-07-03.
- ↑ "Why Mercedes' new inline six matters, even if no one is sure when we'll see it". Autoweek. Retrieved 2018-07-03.
- ↑ "First Drive: 2018 Mercedes-Benz S-Class | Automobile Magazine". Automobile Magazine. 2017-07-18. Retrieved 2018-07-03.
- ↑ "This Little Fan Could Fix the Turbocharger's Biggest Problem—And Make Cars Way More Efficient". WIRED. Retrieved 2018-07-03.
- ↑ "Nine Things You Must Know about the New Mercedes Inline-Six". Car and Driver. Retrieved 2018-07-03.
- ↑ "Why Mercedes-Benz Is Going All In on Straight-Sixes". Road & Track. 2016-11-01. Retrieved 2018-07-03.
- ↑ "2018 Mercedes-Benz S450". Car and Driver. Retrieved 2018-07-03.
- ↑ Kable, Greg (2017-11-19). "2018 Mercedes-Benz CLS review - Mercedes-Benz's new CLS from the passenger seat". Drive. Retrieved 2018-07-03.
- ↑ Panait, Mircea (2017-09-16). "Aston Martin Straight-6 Engine Could Come Back Thanks To Mercedes-Benz". autoevolution. Retrieved 2018-07-03.
- ↑ "The 2019 Mercedes CLS53 and E53 Bring Straight-Sixes Back to AMG". Road & Track. 2018-01-15. Retrieved 2018-07-03.
- ↑ "Hot Hybrids: Mercedes Launches Electrified AMG 53 Range". Motor1.com. Retrieved 2018-07-03.
- ↑ "630bhp Mercedes-AMG GT 4-door Coupé: Edition 1 version confirmed | Autocar". www.autocar.co.uk. Retrieved 2018-07-03.