BMW 7 Series (2018) is 638 mm (25.12 inch) longer, 106 mm (4.17 inch) wider, 23 mm (0.91 inch) higher and has 150 liters (5.30 ft3) bigger cargo space than Mazda 3 (Hatchback) (2015).
Mazda 3 (Hatchback) (2015) is 556 kg (1,226 lbs) lighter than BMW 7 Series (2018).