2021 BMW 4-Series Convertible spy shots and video

BMW has just introduced a new generation of its 4-Series coupe for 2021, a car that's bigger and bolder than its predecessor. In fact, it's even longer than the 3-Series sedan with which it shares a platform and powertrains. Once again, there will be more body styles to choose from. One of them will be a 4-Series Convertible, a prototype for which...