BMW 4 Series (2013) is 545 kg (1,202 lbs) lighter than BMW 5 Series Gran Turismo (2015).
BMW 5 Series Gran Turismo (2015) is 368 mm (14.49 inch) longer, 75 mm (2.95 inch) wider, 197 mm (7.76 inch) higher and has 55 liters (1.94 ft3) bigger cargo space than BMW 4 Series (2013).