Alpina has had a long and steady connection with BMW, modifying a lot of the cars made by the Bavarian manufacturer.
The model, set to rival the next generation BMW M5, uses the same twin-turbo 4.4-liter V8 engine currently available on the X5 M and X6 M. The unit produces 500 HP and 516 lb-ft of torque in the B5, capable of taking it from 0 to 62 mph in 4.7 seconds and up to 191 mph.
That massive engine is combined with a ZF eight-speed automatic transmission. Even though it might not sound like it, the Alpina B5 is pretty economical, achieving 21.7 mpg (US) on the EU combined cycle and emitting around 252 g/km of CO2.
No pricing has been revealed, and as of yet, it will appear in fall in the UK. Until then, check out the photo gallery below with this performance machine.