While engine swaps on BMWs seem downright commonplace, there are the normal engine swaps (the well played out S50/52 comes to mind) and then there’s Hartge. The history between the two premier BMW tuning firms in Germany – Alpina and Hartge – is interesting. They’ve vied for the top spot for several decades with slightly different design philosophies. During that time, they’ve also seemingly flip-flopped; originally, Hartge took a more conservative route than Alpina, whose wild turbocharged creations challenged BMW’s own offerings. But after they were granted full manufacturer status in Germany in 1985, Hartge really came into its own and hasn’t looked back since. While like many firms they offer a line of aerodynamic tweats, wheels, exhausts and engine management chips, their party-piece is taking motors from the larger BMWs and popping them into the 3-series models. None of these conversions is more notable than the E90 H50 though. While the E46 H50 took the V8 out of the 5 series, the E90 had a V8 available in the lineup in the M3. Hartge therefore moved up the food chain to the E60 M5’s S85 V10. With a staggering 500 horspower out of the box and even 50 more with Hartge’s tuning, they transformed the rather mundane small executive sedan into a supercar:
