Audi R8 (2014) is 47 mm (1.85 inch) wider and 315 kg (694 lbs) lighter than Mercedes S-Class Coupe (2015).
Mercedes S-Class Coupe (2015) is 581 mm (22.87 inch) longer, 169 mm (6.65 inch) higher and has 301 liters (10.63 ft3) bigger cargo space than Audi R8 (2014).