Meet the new engine that will power the next generation of Mercedes-AMG sports cars: the M178. As expected, the engine is a twin-turbocharged 4.0-liter V8, and its first application will be in the new Mercedes-AMG GT.
The AMG 4.0 Liter V8 Biturbo Engine (M178) is an AMG V8 petrol engine with twin turbo charging and hot inside ‘V’. It belongs to the new generation V8 engine family from AMG. With a displacement of 4.0 liters and dry sump lubrication, the engine is being introduced for the first time in the Mercedes-AMG GT with the C 190 model series. It has been adapted for use in vehicles offering extremely sporty performance and optimized in terms of output and torque.
The AMG 4.0 Liter V8 Biturbo Engine (M178) features such motorsport-inspired technology as: flow-optimized cylinder heads with zirconium alloy for maximum temperature and thermal conductivity, and therefore maximum performance of the engine, even in critical conditions.
Advanced valve assembly with cam followers and optimized valve springs; Four-valve-per-cylinder design with twin overhead camshafts (DOHC) with camshaft adjustment on the inlet and outlet side enables excellent response and optimizes the gas cycle for each operating point. ”Spectacle” honing for minimal cylinder warpage and low oil consumption.
Forged pistons featuring lightweight design with high strength and a low-friction piston ring package.
Incredible stability is derived from the rigid crankcase and lightweight forged pistons. To help reduce friction losses, the cylinder walls are lined with an innovative nano-slide coating. The crankcase is produced using sand casting technology and features a closed deck design which ensures extreme crankcase stability and enables high injection pressures of up to 140 bar.
The engine’s two turbo chargers are located inside the ”Hot Inner” V8 engine block to keep the unit as compact as possible. An exceptional engine response is created due to the precise routing of fresh air into the exhaust turbo chargers.