Bentley Mulsanne (2015) is 576 mm (22.68 inch) longer, 26 mm (1.02 inch) wider and has 4 liters (0.14 ft3) bigger cargo space than BMW 5 Series (2014).
BMW 5 Series (2014) is 39 mm (1.54 inch) higher and 960 kg (2,116 lbs) lighter than Bentley Mulsanne (2015).