Alfa Romeo 4C (2018) is 39 mm (1.54 inch) wider and 607 kg (1,338 lbs) lighter than BMW 3 Series Gran Turismo (2018).
BMW 3 Series Gran Turismo (2018) is 836 mm (32.91 inch) longer, 322 mm (12.68 inch) higher and has 410 liters (14.48 ft3) bigger cargo space than Alfa Romeo 4C (2018).