Alfa Romeo 4C (2018) is 15 mm (0.59 inch) wider and 689 kg (1,519 lbs) lighter than Cadillac XTS (2015).
Cadillac XTS (2015) is 1144 mm (45.04 inch) longer, 315 mm (12.40 inch) higher and has 399 liters (14.09 ft3) bigger cargo space than Alfa Romeo 4C (2018).