Audi S4 (2017) is 19 mm (0.75 inch) higher, 151 kg (333 lbs) lighter and has 36 liters (1.27 ft3) bigger cargo space than BMW 6 Series Gran Coupe (2018).
BMW 6 Series Gran Coupe (2018) is 264 mm (10.39 inch) longer and 53 mm (2.09 inch) wider than Audi S4 (2017).
