What’s So Great About The AMG 4.0-litre V8 Biturbo Engine
The innovative eight-cylinder unit stands out for its sublime power delivery, the purposeful lightweight construction, as well as its high efficiency and environmental compatibility
by John Clark | 25 July 2014
Mercedes-AMG presents a new technological masterpiece: the AMG 4.0-litre V8 biturbo engine is a new development at the sporting heart of the new Mercedes-AMG GT car. This innovative eight-cylinder unit stands out for its sublime power delivery, the purposeful lightweight construction, as well as its high efficiency and environmental compatibility. With peak power of up to 375 kW (510 hp) and maximum torque of up to 650 Nm the new AMG V8 delivers motorsport-inspired performance. The new sports car engine follows in an impressive V8 tradition that started in 1967 with the M100 in the legendary 300 SEL 6.8 AMG racing car and continues with trendsetting features of the future.
Powerful V8 engines have long been a core competence at AMG, the performance brand from Mercedes-Benz. Innovative and exciting high-performance engines come out of the location in Affalterbach. On this occasion, Mercedes-AMG GmbH is entirely responsible for both development and production.
Tobias Moers, Chairman of the Board of Management of Mercedes-AMG GmbH: “V8 engines are an integral part of the AMG philosophy and the brand’s commitment to ‘Driving Performance’. The V8 biturbo engine for our new GT is going to delight our customers!”
Christian Enderle, Head of Engine and Powertrain Development at Mercedes-AMG: “The new AMG 4.0-litre V8 biturbo sees us presenting an exciting and powerful sports car engine which, thanks to a number of measures, also represents the next step in efficiency.”
First sports car engine with ‘hot inside V’ and dry sump lubrication
The new AMG V8 engine has two turbochargers which are not mounted on the outside of the cylinder banks but rather inside the V configuration – experts call it a ‘hot inside V’. The benefits are a compact engine design, an optimum response and low exhaust gas emissions. Dry sump lubrication allows the engine to be installed lower, which moves the centre of gravity closer to the road and forms the basis for high lateral acceleration. The M178 (in-house designation) from AMG is thus the world’s first sports car engine with hot inside V and dry sump lubrication. With a dry weight of 209 kg the new AMG V8 is also the lightest engine in its competitive segment.
The new AMG M178 V8 engine at a glance:
|Valves per cylinder||4|
|Bore x stroke||83.0 x 92.0 mm|
|Cylinder spacing||90 mm|
|Compression ratio||10.5 : 1|
|Output||375 kW (510 hp) at 6250 rpm|
|Output per litre||94.2 kW/litre
|Max. torque||650 Nm at 1750 – 4750 rpm|
|Torque per litre||163.2 Nm/litre|
|Maximum engine speed||7200 rpm|
|Maximum charge pressure||1.2 bar|
|Peak pressure||130 bar|
|Engine weight (dry)||209 kg|
|Emissions standard||Euro 6|