BMW 4 Series (2015) is 1109 kg (2,445 lbs) lighter than Rolls-Royce Phantom (2014).
Rolls-Royce Phantom (2014) is 1393 mm (54.84 inch) longer, 119 mm (4.69 inch) wider, 258 mm (10.16 inch) higher and has 14 liters (0.49 ft3) bigger cargo space than BMW 4 Series (2015).