BMW 5 Series Gran Turismo (2016) is 347 mm (13.66 inch) longer and 20 mm (0.79 inch) wider than BMW X3 (2015).
BMW X3 (2015) is 102 mm (4.02 inch) higher, 120 kg (265 lbs) lighter and has 50 liters (1.77 ft3) bigger cargo space than BMW 5 Series Gran Turismo (2016).