Here's our visual comparison of the
BMW M850i xDrive Coupe (G16) against the outgoing 6 Series Coupe M Sport (F13).
Dimensionally, here's how they compare. The 8 Series is:
1.5 inches shorter than the 6 Series Coupe
0.3 inches wider than the 6 Series Coupe
1 inch lower than the 6 Series Coupe
1.3 inch shorter wheelbase than the 6 Series Coupe