320 hp and 450 Nm, CO2 emissions 176 g/km and acceleration of 0 to 100 km/h in 5.5 seconds. The BMW TwinPower Turbo inline petrol engine in the BMW 640i combines revolutionary technologies with innovative fine-tuning. The TwinScroll turbochargers and Valvetronic feed fresh air into the combustion chambers. Here the High-Precision Injection creates a precisely harmonised fuel-air mixture within milliseconds while Double-VANOS perfectly adapts engine output to the engine speed range. The result: maximum efficiency precisely when full power is not needed and maximum power across a wide rev range − plus a direct response at all times when driving in dynamic style.