BMW 8 Series (G14) (2020) is 173 mm (6.81 inch) longer and 106 mm (4.17 inch) wider than Mazda 3 (Sedan) (2018).
Mazda 3 (Sedan) (2018) is 106 mm (4.17 inch) higher, 540 kg (1,190 lbs) lighter and has 69 liters (2.44 ft3) bigger cargo space than BMW 8 Series (G14) (2020).