Audi Q8 (2018) is 301 mm (11.85 inch) longer, 185 mm (7.28 inch) wider, 174 mm (6.85 inch) higher and has 324 liters (11.44 ft3) bigger cargo space than Opel Astra Sports Tourer (2020).
Opel Astra Sports Tourer (2020) is 700 kg (1,543 lbs) lighter than Audi Q8 (2018).
