2018 BMW 640

There have been many versions of the BMW 6 Series. Now there's a four-
 door Gran Turismo, a sort of hatchback version of the 6 Series we got up 
 close and personal with at the 2018 Chicago Auto Show.

BMW unveiled a new 6 Series in four-door Gran Turismo form. It comes in 
 one variation: the 640i xDrive.