Alpina uses a variant of the N63 engine that makes at least 25% more power than the base engine. Compared to the S63, Alpina's first and second variants 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.[7]
First generation[edit]
4.4 L V8 Bi-Turbo engine developing 507 PS (373 kW; 500 hp) and 700 N·m (516 lb·ft).
2010***8211;2011 Alpina B5 Bi-Turbo Sedan/Touring: based on the BMW F10/F11 5 Series
2009***8211;2012 Alpina B7 Bi-Turbo: based on the BMW F01 7 Series[8][9]
Second generation[edit]
4.4 L V8 Bi-Turbo engine developing 540 PS (397 kW; 533 hp) and 730 N·m (538 lb·ft).
2011***8211;2015 Alpina B6 Bi-Turbo Coupé/Cabrio: based on the BMW F12/F13 6 Series[10]
2012***8211;2014 Alpina B5 Bi-Turbo Sedan/Touring: based on the BMW F10/F11 5 Series[10]
2012***8211;2015 Alpina B7 Bi-Turbo: based on the BMW F01 7 Series[11][12]
2014***8211;2015 Alpina B6 Bi-Turbo Gran Coupé: based on the BMW F06 6 Series[12]
Third generation[edit]
4.4 L V8 Bi-Turbo engine developing 600 PS (441 kW; 592 hp) or 608 PS (447 kW; 600 hp) and 800 N·m (590 lb·ft).
2015 Alpina B5 Bi-Turbo Edition 50 Sedan/Touring: based on the BMW F10/F11 5 Series (600 PS)[13]
2015***8211;2016 Alpina B6 Bi-Turbo Edition 50 Coupé/Cabrio: based on the BMW F12/F13 6 Series (600 PS)[13]
2015***8211;present Alpina B6 Bi-Turbo: based on the BMW F06/F12/F13 6 Series (600 PS)[13]
2015***8211;present Alpina B5 Bi-Turbo: based on the BMW F10/F11 5 Series (600 PS)
2016***8211;present Alpina B7 Bi-Turbo: based on the BMW G12 7 Series (608 PS)
Source: Wikipedia