BMW 3 Series Touring (2015) is 46 mm (1.81 inch) higher, 40 kg (88 lbs) lighter and has 50 liters (1.77 ft3) bigger cargo space than BMW 4 Series (2015).
BMW 4 Series (2015) is 65 mm (2.56 inch) longer and 59 mm (2.32 inch) wider than BMW 3 Series Touring (2015).
