BMW 4 Series Gran Coupe (2017) is 1172 mm (46.14 inch) longer, 206 mm (8.11 inch) wider and has 285 liters (10.06 ft3) bigger cargo space than Citroen C1 (2020).
Citroen C1 (2020) is 79 mm (3.11 inch) higher and 856 kg (1,887 lbs) lighter than BMW 4 Series Gran Coupe (2017).