The 4395 cm³ eight-cylinder engine delivers a power output of 397 kW (540 hp) at a moderate 5200 to 6250 rpm and a maximum torque of 730 Nm between 2800 to 5000 rpm. The Bi-Turbo engine concept consist of two ALPINA-specific turbochargers arranged in the V of the engine that operate in parallel. They are equipped with high-performance, flow-optimised vanes and housings. The turbochargers provide maximum torque over a wide rpm range and also ensure instantaneous response at low engine speeds. The indirect intercooling system with short intake paths and flow-optimised charge-air routing is responsible for highly efficient operation. The high-performance system guarantees thermally adequate cooling by means of a large-volume low-temperature intercooler and close-coupled intercoolers. The other media cooling required due to the high power output is realised by means of large-capacity oil and coolant radiators located behind the front spoiler. MAHLE high-performance pistons run in the cylinders and are specially matched to the thermodynamic loads of the engine, which is charged to 1.2 bar and has a compression ratio of 10.0:1.Petrol direct injection, VALVETRONIC and BMW Efficient Dynamics technologies such as the Auto Start Stop function make it possible to achieve a combined fuel consumption in accordance with the ECE norm of only 9.4 to 10.4 l/100 km and emissions of 219 to 242 g/km CO2, depending on model.