Alpina
Alpina uses a variant of the N63 engine that makes 25% more power than the base engine. Compared to the S63, Alpina's variant makes lower horsepower but more torque.
For the 2013 model year, it received Valvetronic like all other N63 engines. Compared to BMW M's version of the 4.4L twin-turbo engine (such as found in the F10 BMW M5), Alpina's engine has 20 hp less but more maximum torque which is also available at a lower RPM.
- ALPINA B5 Bi-Turbo Sedan/Touring: based on the BMW F10/F11 5 Series - featuring a 4.4 L V8 Bi-Turbo engine 507 PS (373 kW; 500 hp) / 700 N·m (516 lb·ft)
- ALPINA B7 Bi-Turbo: based on the BMW F01 7 Series - featuring a 4.4 L V8 Bi-Turbo engine 507 PS (373 kW; 500 hp) / 700 N·m (516 lb·ft)
Read more about this topic: BMW N63