BMW 8 Series (G14) (2018) is 782 mm (30.79 inch) longer, 209 mm (8.23 inch) wider and has 58 liters (2.05 ft3) bigger cargo space than Seat Ibiza (2014).
Seat Ibiza (2014) is 106 mm (4.17 inch) higher and 734 kg (1,618 lbs) lighter than BMW 8 Series (G14) (2018).