BMW 5 Series (2017) is 282 mm (11.10 inch) longer, 71 mm (2.80 inch) wider, 54 mm (2.13 inch) higher and has 150 liters (5.30 ft3) bigger cargo space than Mazda 3 (Sedan) (2018).
Mazda 3 (Sedan) (2018) is 322 kg (710 lbs) lighter than BMW 5 Series (2017).
