BMW 5 Series Gran Turismo (2018) is 668 mm (26.30 inch) longer, 57 mm (2.24 inch) wider and has 171 liters (6.04 ft3) bigger cargo space than Citroen DS4 (2020).
Citroen DS4 (2020) is 58 mm (2.28 inch) higher and 261 kg (575 lbs) lighter than BMW 5 Series Gran Turismo (2018).