Alfa Romeo 4C (2016) is 18 mm (0.71 inch) wider and 630 kg (1,389 lbs) lighter than GMC Terrain (2014).
GMC Terrain (2014) is 719 mm (28.31 inch) longer, 500 mm (19.69 inch) higher and has 1682 liters (59.40 ft3) bigger cargo space than Alfa Romeo 4C (2016).