Most modern BMW M5s have lost what it means to be an M5. Even the new F90 M5 is just too isolated, too comfortable to be mentioned in the same breath as cars like the E28-gen M5. When the original M5 debuted, it was faster than most supercars of its time and handled better than them, too. It was genuinely a four-door supercar. And while modern M5s are bonkers quick, they never feel like proper supercars, just sedans. The BMW M5 CS, however, that feels like a supercar.