Bentley Flying Spur (2018) is 473 mm (18.62 inch) longer and 147 mm (5.79 inch) wider than BMW 3 Series Gran Turismo (2021).
BMW 3 Series Gran Turismo (2021) is 21 mm (0.83 inch) higher, 837 kg (1,845 lbs) lighter and has 46 liters (1.62 ft3) bigger cargo space than Bentley Flying Spur (2018).