BMW 8 Series (G15) (2019) is 383 mm (15.08 inch) longer, 106 mm (4.17 inch) wider and has 56 liters (1.98 ft3) bigger cargo space than Mazda 3 (Hatchback) (2019).
Mazda 3 (Hatchback) (2019) is 99 mm (3.90 inch) higher and 564 kg (1,243 lbs) lighter than BMW 8 Series (G15) (2019).