BMW 8 Series (G14) (2018) is 263 mm (10.35 inch) longer and 106 mm (4.17 inch) wider than Mazda 3 (Sedan) (2016).
Mazda 3 (Sedan) (2016) is 116 mm (4.57 inch) higher, 608 kg (1,340 lbs) lighter and has 69 liters (2.44 ft3) bigger cargo space than BMW 8 Series (G14) (2018).