Alpina has always struck me as one of the most thorough tuners in the world. Their research and development of engines, suspension and exhaust is second only to perhaps Ruf and AMG, thanks largely to their close associations with the factory. Inside the fit and finish of the cars is perhaps even better than they came originally; beautiful details that make the cars stand apart. And visually Alpinas have always been the best looking BMWs out there in my opinion; subtle aerodynamic tweaks, beautiful wheels and striking but tasteful “go faster” stripes that distinguish Munich’s best. But even amongst Alpinas there are special models, and the E34 B10 BiTurbo is one of them. Alpina took a normal 535i and made it’s own interpretation of what the M5 could be; instead of a high-revving twin cam S38, you got two turbochargers with enough torque to embarrass those boys from Affalterbach. Alpina achieved this through a full custom build; Mahle pistons, custom oil sprayers to cool the them, stronger connecting rods, sodium-filled valves and bespoke intake and exhaust systems – but then, Alpina’s never been shy about producing it’s own items. While all Alpinas are rare, the B10 BiTurbo was fairly popular; of the 1600-odd E34s Alpina built, a full 507 of them were B10s.