BMW 8 Series (G16) (2020) is 421 mm (16.57 inch) longer, 136 mm (5.35 inch) wider and has 21 liters (0.74 ft3) bigger cargo space than Mazda 3 (Sedan) (2017).
Mazda 3 (Sedan) (2017) is 38 mm (1.50 inch) higher and 516 kg (1,138 lbs) lighter than BMW 8 Series (G16) (2020).