BMW 6 Series Gran Turismo (2019) is 761 mm (29.96 inch) longer, 113 mm (4.45 inch) wider, 50 mm (1.97 inch) higher and has 201 liters (7.10 ft3) bigger cargo space than Citroen C4 (2014).
Citroen C4 (2014) is 515 kg (1,135 lbs) lighter than BMW 6 Series Gran Turismo (2019).