Audi Q8 (2019) is 81 mm (3.19 inch) longer, 138 mm (5.43 inch) wider, 194 mm (7.64 inch) higher and has 304 liters (10.74 ft3) bigger cargo space than Opel Insignia Sports Tourer (2014).
Opel Insignia Sports Tourer (2014) is 575 kg (1,268 lbs) lighter than Audi Q8 (2019).