BMW 8 Series (G15) (2018) is 705 kg (1,554 lbs) lighter than Rolls-Royce Phantom (2016).
Rolls-Royce Phantom (2016) is 999 mm (39.33 inch) longer, 88 mm (3.46 inch) wider, 297 mm (11.69 inch) higher and has 39 liters (1.38 ft3) bigger cargo space than BMW 8 Series (G15) (2018).