Audi TT RS (2018) is 16 mm (0.63 inch) higher and 501 kg (1,105 lbs) lighter than BMW 8 Series (G14) (2018).
BMW 8 Series (G14) (2018) is 652 mm (25.67 inch) longer, 70 mm (2.76 inch) wider and has 70 liters (2.47 ft3) bigger cargo space than Audi TT RS (2018).