BMW 8 Series (G15) (2018) is 543 mm (21.38 inch) longer, 122 mm (4.80 inch) wider and has 42 liters (1.48 ft3) bigger cargo space than Hyundai i30 (2015).
Hyundai i30 (2015) is 129 mm (5.08 inch) higher and 654 kg (1,442 lbs) lighter than BMW 8 Series (G15) (2018).