Alfa Romeo 4C (2018) is 18 mm (0.71 inch) wider and 620 kg (1,367 lbs) lighter than GMC Terrain (2021).
GMC Terrain (2021) is 719 mm (28.31 inch) longer, 498 mm (19.61 inch) higher and has 1682 liters (59.40 ft3) bigger cargo space than Alfa Romeo 4C (2018).