Audi S6 (2014) is 125 mm (4.92 inch) longer, 46 mm (1.81 inch) higher, 375 kg (827 lbs) lighter and has 41 liters (1.45 ft3) bigger cargo space than Bentley Continental GT (2015).
Bentley Continental GT (2015) is 70 mm (2.76 inch) wider than Audi S6 (2014).