BMW 8 Series (G14) (2018) is 1377 mm (54.21 inch) longer, 282 mm (11.10 inch) wider and has 154 liters (5.44 ft3) bigger cargo space than Citroen C1 (2020).
Citroen C1 (2020) is 129 mm (5.08 inch) higher and 967 kg (2,132 lbs) lighter than BMW 8 Series (G14) (2018).