Audi Q8 (2019) is 577 mm (22.72 inch) longer, 190 mm (7.48 inch) wider, 213 mm (8.39 inch) higher and has 443 liters (15.64 ft3) bigger cargo space than Mercedes GLA-Class (2015).
Mercedes GLA-Class (2015) is 780 kg (1,720 lbs) lighter than Audi Q8 (2019).