The N62B44's output is increased by means of a centrifugal supercharger. The supercharger is made by the company ASA, and is also called "Turbessor" because it is able to combine the advantages of turbocharger and supercharger. At low speeds, it spontaneously responds as a conventional displacement compressor, but it can also immediately provide the thrust of a turbo. It also reaches speeds of more than 100,000 revolutions per minute. As compared to the 545i performance has increased from to , torque was increased from to . The power is transmitted to the rear wheels by means of a six-speed automatic transmission (6HP26). As usual with Alpina, this was refined and has "Switch-Tronic".