Audi S8 (2014) is 250 mm (9.84 inch) longer, 86 mm (3.39 inch) wider, 13 mm (0.51 inch) higher and has 15 liters (0.53 ft3) bigger cargo space than Opel Insignia Grand Sport (2017).
Opel Insignia Grand Sport (2017) is 1629 kg (3,591 lbs) lighter than Audi S8 (2014).
