BMW 4 Series (2016) is 975 kg (2,150 lbs) lighter than Rolls-Royce Phantom (2018).
Rolls-Royce Phantom (2018) is 1291 mm (50.83 inch) longer, 147 mm (5.79 inch) wider, 273 mm (10.75 inch) higher and has 93 liters (3.28 ft3) bigger cargo space than BMW 4 Series (2016).