BMW 5 Series Gran Turismo (2018) is 397 mm (15.63 inch) longer, 179 mm (7.05 inch) higher and has 180 liters (6.36 ft3) bigger cargo space than Mercedes AMG GT (2018).
Mercedes AMG GT (2018) is 72 mm (2.83 inch) wider and 54 kg (119 lbs) lighter than BMW 5 Series Gran Turismo (2018).