Audi Q8 (2018) is 589 mm (23.19 inch) longer, 165 mm (6.50 inch) wider, 98 mm (3.86 inch) higher and has 429 liters (15.15 ft3) bigger cargo space than Mercedes GLA-Class (2017).
Mercedes GLA-Class (2017) is 612 kg (1,349 lbs) lighter than Audi Q8 (2018).