BMW i8 (2017) is 1069 kg (2,357 lbs) lighter than Rolls-Royce Phantom (2016).
Rolls-Royce Phantom (2016) is 1153 mm (45.39 inch) longer, 48 mm (1.89 inch) wider, 345 mm (13.58 inch) higher and has 305 liters (10.77 ft3) bigger cargo space than BMW i8 (2017).