Audi R8 (2014) is 35 mm (1.38 inch) longer and 110 mm (4.33 inch) wider than Mercedes GLA-Class (2018).
Mercedes GLA-Class (2018) is 366 mm (14.41 inch) higher, 72 kg (159 lbs) lighter and has 336 liters (11.87 ft3) bigger cargo space than Audi R8 (2014).