With the Mercedes AMG GT gearing up for production, we’ve heard more and more about the new and innovative engineering going into its power-plant, the 4.0 liter biturbo V8.
With peak power of up to 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.
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.
A combination of biturbocharging and direct petrol injection with spray-guided combustion increases thermodynamic efficiency, thereby reducing fuel consumption and exhaust gas emissions. Particularly fast and precise piezo injectors spray the fuel at high pressure into eight combustion chambers. Multiple injection occurs on-demand, ensuring a homogeneous fuel/air mixture. The delivery of fuel is electronically controlled and fully variable for a fuel pressure between 100 and 200 bar.
Here are the exact specifications from Mercedes AMG,
|Valves per cylinder||4|
|Bore x stroke||83.0 x 92.0 mm|
|Cylinder spacing||90 mm|
|Compression ratio||10.5 : 1|
|Output||510 hp at 6250 rpm|
|Output per litre||128 hp/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|