BMW 8 Series (G15) (2018) is 448 mm (17.64 inch) longer and 107 mm (4.21 inch) wider than Mazda CX-30 (2015).
Mazda CX-30 (2015) is 199 mm (7.83 inch) higher, 544 kg (1,199 lbs) lighter and has 455 liters (16.07 ft3) bigger cargo space than BMW 8 Series (G15) (2018).