BMW X4 (2018) is 26 mm (1.02 inch) higher, 780 kg (1,720 lbs) lighter and has 186 liters (6.57 ft3) bigger cargo space than Rolls-Royce Phantom Coupe (2015).
Rolls-Royce Phantom Coupe (2015) is 941 mm (37.05 inch) longer and 106 mm (4.17 inch) wider than BMW X4 (2018).