Audi Q8 (2018) is 582 mm (22.91 inch) longer, 195 mm (7.68 inch) wider, 215 mm (8.46 inch) higher and has 443 liters (15.64 ft3) bigger cargo space than Mercedes GLA-Class (2014).
Mercedes GLA-Class (2014) is 780 kg (1,720 lbs) lighter than Audi Q8 (2018).