Bugatti Chiron (2016) is 21 mm (0.83 inch) wider and 517 kg (1,140 lbs) lighter than Rolls-Royce Phantom (2020).
Rolls-Royce Phantom (2020) is 1227 mm (48.31 inch) longer, 434 mm (17.09 inch) higher and has 487 liters (17.20 ft3) bigger cargo space than Bugatti Chiron (2016).