BMW 8 Series (G14) (2020) is 439 mm (17.28 inch) longer and 107 mm (4.21 inch) wider than Mazda CX-30 (2015).
Mazda CX-30 (2015) is 201 mm (7.91 inch) higher, 553 kg (1,219 lbs) lighter and has 525 liters (18.54 ft3) bigger cargo space than BMW 8 Series (G14) (2020).