BMW 8 Series (G15) (2019) is 313 mm (12.32 inch) longer and 31 mm (1.22 inch) wider than Citroen DS5 (2020).
Citroen DS5 (2020) is 164 mm (6.46 inch) higher, 320 kg (705 lbs) lighter and has 45 liters (1.59 ft3) bigger cargo space than BMW 8 Series (G15) (2019).