Alfa Romeo 4C (2015) is 16 mm (0.63 inch) wider and 694 kg (1,530 lbs) lighter than Cadillac XTS (2014).
Cadillac XTS (2014) is 1144 mm (45.04 inch) longer, 317 mm (12.48 inch) higher and has 399 liters (14.09 ft3) bigger cargo space than Alfa Romeo 4C (2015).