BMW 4 Series Gran Coupe (2018) is 92 mm (3.62 inch) longer, 100 mm (3.94 inch) higher and has 131 liters (4.63 ft3) bigger cargo space than Mercedes AMG GT (2018).
Mercedes AMG GT (2018) is 113 mm (4.45 inch) wider and 167 kg (368 lbs) lighter than BMW 4 Series Gran Coupe (2018).