BMW 7 Series (2018) is 519 mm (20.43 inch) longer, 106 mm (4.17 inch) wider, 23 mm (0.91 inch) higher and has 95 liters (3.35 ft3) bigger cargo space than Mazda 3 (Sedan) (2014).
Mazda 3 (Sedan) (2014) is 560 kg (1,235 lbs) lighter than BMW 7 Series (2018).