Preview: 2021 BMW M3 sedan and M4 coupe offers up to 503 hp, AWD

The introduction of a new BMW M3 and its M4 coupe variant is always a momentous occasion, as the cars have traditionally set the benchmark for the respective small sport sedan and sport coupe segments. Judging by the specs, this will likely be the case for the latest 2021 BMW M3 and M4 which were revealed late on Tuesday. They reach showrooms next...