BMW 8 Series (G16) (2020) is 502 mm (19.76 inch) longer, 136 mm (5.35 inch) wider and has 21 liters (0.74 ft3) bigger cargo space than Mazda 3 (Sedan) (2015).
Mazda 3 (Sedan) (2015) is 48 mm (1.89 inch) higher and 594 kg (1,310 lbs) lighter than BMW 8 Series (G16) (2020).