Long hood, thin glass, melodious inline 6-cylinder engine. The E24 embodies the grand BMW coupe of the 1980s. It devours the Autobahn with regal stability. In the M635CSi guise, it becomes downright brutal. This isn't a lightweight sports car. It's a fast, enduring, and refined grand tourer. A BMW that drives fast, for long periods, without needing to justify itself.