BMW 8 Series (G14) (2018) is 543 mm (21.38 inch) longer and 122 mm (4.80 inch) wider than Hyundai i30 (2015).
Hyundai i30 (2015) is 131 mm (5.16 inch) higher, 653 kg (1,440 lbs) lighter and has 28 liters (0.99 ft3) bigger cargo space than BMW 8 Series (G14) (2018).