Audi S6 (2016) is 734 kg (1,618 lbs) lighter than Rolls-Royce Phantom (2016).
Rolls-Royce Phantom (2016) is 911 mm (35.87 inch) longer, 116 mm (4.57 inch) wider, 198 mm (7.80 inch) higher and has 60 liters (2.12 ft3) bigger cargo space than Audi S6 (2016).