BMW 7 Series (2018) is 1632 mm (64.25 inch) longer, 282 mm (11.10 inch) wider, 10 mm (0.39 inch) higher and has 318 liters (11.23 ft3) bigger cargo space than Citroen C1 (2017).
Citroen C1 (2017) is 904 kg (1,993 lbs) lighter than BMW 7 Series (2018).