Originally Posted by e85sbm
What really shocks me is that there is an assumption this would be an ///M version of the Gran Coupe.
Is the Gran Coupe not 2 feet longer and much wider than a 3/4 series? How could one make this assumption based on the photos which truly represent a smaller car which would be more in line with it being a future 4 series.
There's no assumption made that this is the M6 Gran Coupe, only that such a shape with a coupe silhouette could possibly only be two known upcoming 'coupe' style M models - the F82 M4 coupe and M6 Gran Coupe.
There's no tape measure or other car next to the mystery model, so scale and size are not as easily discernible as you make it seem. The analysis however, eliminates the the M6 Gran Coupe as a possibility in favor of the M4 coupe.