BMW X6 (2020) is 29 mm (1.14 inch) wider, 54 mm (2.13 inch) higher, 250 kg (551 lbs) lighter and has 121 liters (4.27 ft3) bigger cargo space than Rolls-Royce Phantom (2015).
Rolls-Royce Phantom (2015) is 901 mm (35.47 inch) longer than BMW X6 (2020).