Alpina B5 Bi-Turbo Gets More Power
21 Feb 2012, 10:58 UTC · By: Mihnea Radu / Alpina has decided to boost the B5 Bi-Turbo, which is basically a tuned 550i F10 5-Series tuned to the max. The Alpina version was already a powerful beast, delivering 500 hp instead of the stock 40...