After a lengthy hiatus, BMW's big coupe is back. The all-new BMW 6 Series delivers stellar performance, brilliant handling, and that arrow-like stability that marks this marque. The new 645Ci is a Grand Touring coupe. It's a unique vehicle in the current BMW lineup.Though it has recently expanded its line to cover a broad range of vehicles, BMW has historically been known for its sports sedans. Its coupes and convertibles date back to the late 1930s, however. They started with the beautiful 1938 327 Coupe with sweeping fenders and available two-tone paint. That was quickly followed by a specially built 328 coupe that won the prestigious Mille Miglia in 1940. For most Americans, however, this new BMW recalls coupes of the mid-1970s: the 1968 2800 CS Coupe, the 1975 3.0 CSi, the 3.0 CSL, and the 6 Series cars that debuted in 1976. The highly regarded 635CSi was a member of this last-generation 6 Series. And the 8 Series coupes of the early 1990s are also considered part of BMW's big coupe lineage.Click here to read more