Audi S8 (2015) is 341 mm (13.43 inch) longer, 5 mm (0.20 inch) wider, 74 mm (2.91 inch) higher and has 147 liters (5.19 ft3) bigger cargo space than Bentley Continental GT (2014).
Bentley Continental GT (2014) is 724 kg (1,596 lbs) lighter than Audi S8 (2015).