BMW 8 Series (G15) (2018) is 782 mm (30.79 inch) longer, 209 mm (8.23 inch) wider and has 128 liters (4.52 ft3) bigger cargo space than Seat Ibiza (2014).
Seat Ibiza (2014) is 104 mm (4.09 inch) higher and 735 kg (1,620 lbs) lighter than BMW 8 Series (G15) (2018).