Bentley Mulsanne (2014) is 569 mm (22.40 inch) longer and 26 mm (1.02 inch) wider than BMW 5 Series Gran Turismo (2015).
BMW 5 Series Gran Turismo (2015) is 38 mm (1.50 inch) higher, 630 kg (1,389 lbs) lighter and has 57 liters (2.01 ft3) bigger cargo space than Bentley Mulsanne (2014).