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 (2015).
Seat Ibiza (2015) is 106 mm (4.17 inch) higher and 874 kg (1,927 lbs) lighter than BMW 8 Series (G14) (2018).