Audi Q8 (2018) is 338 mm (13.31 inch) longer, 203 mm (7.99 inch) wider, 264 mm (10.39 inch) higher and has 445 liters (15.71 ft3) bigger cargo space than Mazda 3 (Sedan) (2017).
Mazda 3 (Sedan) (2017) is 782 kg (1,724 lbs) lighter than Audi Q8 (2018).