Audi Q7 (2015) is 99 mm (3.90 inch) higher, 294 kg (648 lbs) lighter and has 730 liters (25.78 ft3) bigger cargo space than Rolls-Royce Phantom (2015).
Rolls-Royce Phantom (2015) is 756 mm (29.76 inch) longer and 6 mm (0.24 inch) wider than Audi Q7 (2015).