Audi R8 (2015) is 174 mm (6.85 inch) wider than Mercedes C-Class (Coupe) (2014).
Mercedes C-Class (Coupe) (2014) is 147 mm (5.79 inch) longer, 185 mm (7.28 inch) higher, 30 kg (66 lbs) lighter and has 232 liters (8.19 ft3) bigger cargo space than Audi R8 (2015).