Audi Q8 (2018) is 313 mm (12.32 inch) longer, 189 mm (7.44 inch) wider, 300 mm (11.81 inch) higher and has 508 liters (17.94 ft3) bigger cargo space than Mercedes C-Class (Coupe) (2017).
Mercedes C-Class (Coupe) (2017) is 625 kg (1,378 lbs) lighter than Audi Q8 (2018).