BMW 8 Series (G16) (2019) is 622 mm (24.49 inch) longer, 136 mm (5.35 inch) wider and has 76 liters (2.68 ft3) bigger cargo space than Mazda 3 (Hatchback) (2017).
Mazda 3 (Hatchback) (2017) is 33 mm (1.30 inch) higher and 634 kg (1,398 lbs) lighter than BMW 8 Series (G16) (2019).