Mercedes-AMG Engine

M157

The Mercedes-AMG M157 is a DOHC V8 gasoline piston engine.

Years
2011–2018
Configuration
V8
Fuel
Gasoline
Top power
585 PS
Mercedes-AMG M157 V8 engine

AMG’s first twin-turbo road V8 — 5.5 liters, hot-V turbos, and the torque that ended the naturally aspirated 63 era.

Based on the Mercedes M278 architecture rather than the in-house M156 it replaced, the M157 stretched bore and stroke to 98 × 90.5 mm for 5,461 cc, added a forged crank and conrods, and nestled a pair of Honeywell turbos in the V with a charge-air cooler on top. Direct injection and continuous cam phasing on both banks kept the combustion clean enough for a new decade. Debuting around 2011 in the CL 63 and S 63, it badged every car “63” despite the smaller displacement — marketing continuity over literal liters.

Outputs started near 537 PS and 800 N·m, with Performance Package and later S models pushing toward 585 PS and 900 N·m. The R231 SL 63 AMG carried it from 2012 to 2014; by the late 2010s the modular 4.0-liter M177 had taken over Affalterbach’s V8 duties.

Versions.

Every factory version of the M157.

VersionDisplacementBore × StrokeCompressionPowerTorque
157.980 (DEH 55 LA)5,461 cc 98 × 90.5 mm 10400 kW (536 hp; 544 PS) at 5,500 rpm800 N·m (590 lb·ft) at 2,000 rpm
157.980 (DEH 55 LA)5,461 cc 98 × 90.5 mm 10420 kW (563 hp; 571 PS) at 5,500 rpm900 N·m (664 lb·ft) at 2,250 rpm
157.981 (DEH 55 LA)5,461 cc 98 × 90.5 mm 10386 kW (518 hp; 525 PS) at 5,250 rpm700 N·m (516 lb·ft) at 1,750 rpm
157.981 (DEH 55 LA)5,461 cc 98 × 90.5 mm 10410 kW (550 hp; 557 PS) at 5,500 rpm720 N·m (531 lb·ft) at 1,750 rpm
157.981 (DEH 55 LA)5,461 cc 98 × 90.5 mm 10410 kW (550 hp; 557 PS) at 5,250 rpm800 N·m (590 lb·ft) at 2,000 rpm
157.981 (DEH 55 LA)5,461 cc 98 × 90.5 mm 10430 kW (577 hp; 585 PS) at 5,500 rpm800 N·m (590 lb·ft) at 1,750 rpm
157.982 (DE 55 LA)5,461 cc 98 × 90.5 mm 10386 kW (518 hp; 525 PS) at 5,250 rpm700 N·m (516 lb·ft) at 1,750 rpm
157.982 (DE 55 LA)5,461 cc 98 × 90.5 mm 10410 kW (550 hp; 557 PS) at 5,250 rpm760 N·m (561 lb·ft) at 2,000 rpm
157.9835,461 cc 98 × 90.5 mm 10395 kW (530 hp; 537 PS) at 5,500 rpm800 N·m (590 lb·ft) at 2,000 rpm

Applications.

Every model powered by the M157.

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