Mercedes-Benz officially unveiled today its all-new twin-turbo 4.0-liter V8 engine that will be powering the 2015 Mercedes-AMG GT. Codenamed M178, the new 4.0-liter biturbo V8 engine delivers 510 hp (375 kW) at 6,250 rpm and a maximum torque of 650 Nm (479 lb-ft) between 1,750 rpm and 4,750 rpm.
According to Mercedes-Benz, the engine is the latest member of the BlueDIRECT engine family, it is Euro 6-compliant and has a weight of 209 kg (460 lbs). The new engine features motorsport-inspired technology such as optimized cylinder heads with zirconium alloy for maximum temperature and thermal conductivity.
The four-valve-per-cylinder design with twin overhead camshaft (DOHC) with camshaft adjustment on the inlet and outlet side enables excellent response and optimizes gas cycle for each operating point. The forged pistons feature lightweight design with high strength and a low-friction piston ring package.
As you can see from the photos, the engine’s turbocharges are located inside the “Hot Inner” V8 engine in order to keep the unit as compact as possible.
Mercedes-Benz is expected to use the new 4.0-liter biturbo V8 engine on the new C63 AMG models but the first to use it will be the Mercedes-AMG GT, which will go on sale in March 2015.