BMW 8 Series (G15) (2018) is 784 mm (30.87 inch) longer, 122 mm (4.80 inch) wider and has 65 liters (2.30 ft3) bigger cargo space than Seat Ibiza (2020).
Seat Ibiza (2020) is 103 mm (4.06 inch) higher and 833 kg (1,836 lbs) lighter than BMW 8 Series (G15) (2018).