BMW 8 Series (G15) (2019) is 263 mm (10.35 inch) longer, 106 mm (4.17 inch) wider and has 1 liters (0.04 ft3) bigger cargo space than Mazda 3 (Sedan) (2015).
Mazda 3 (Sedan) (2015) is 114 mm (4.49 inch) higher and 509 kg (1,122 lbs) lighter than BMW 8 Series (G15) (2019).