Its not the "BMW 4-series coupe concept." Its the "BMW Concept 4-series Coupe." This makes sense to BMW and to no one else. Low and wide and long, the 4-series follows in the stretched-out footprint of its kin, the 640i Gran Coupe. It rides on a 110.6-inch wheelbase, up nearly two inches from that of the outgoing 3-series coupe. The 4-series also has bulked-up by almost two inches in width. At 182.7 inches, the 4-series is longer than the model it replaces and its roof is about half an inch lower. This gives the 4-series concept a low, menacing stance.