BMW 7 Series (2020) is 1170 mm (46.06 inch) longer, 187 mm (7.36 inch) wider, 9 mm (0.35 inch) higher and has 230 liters (8.12 ft3) bigger cargo space than Citroen DS3 (2017).
Citroen DS3 (2017) is 870 kg (1,918 lbs) lighter than BMW 7 Series (2020).