B6 Bi-Turbo Coupe, like its drop-top car, powered by the standard version of the 650i twin-turbo 4.4-liter V-8 massage to the tune of 540 hp and 516 lb-ft of torque. To achieve this, the turbine exhaust turbocharger Alpina upsized to give you more power over the wide range of rpm. Put the power to the pavement B6 with help from an eight-speed automatic transmission switch-Tronic designed by ZF. The Gearbox is designed for comfor cruising, but is also able to bang out crisp shifting when switching to sports shift Mode. Alpina claims the whole package is good for zero to 62 mph in 4.4 seconds and a top speed of 197 mph.