BMW 3 Series Gran Turismo (2021) is 497 mm (19.57 inch) longer, 40 mm (1.57 inch) wider, 20 mm (0.79 inch) higher and has 113 liters (3.99 ft3) bigger cargo space than Citroen C4 (2020).
Citroen C4 (2020) is 300 kg (661 lbs) lighter than BMW 3 Series Gran Turismo (2021).