BMW 1 Series (2014) is 340 kg (750 lbs) lighter than BMW 5 Series (2016).
BMW 5 Series (2016) is 547 mm (21.54 inch) longer, 111 mm (4.37 inch) wider, 52 mm (2.05 inch) higher and has 200 liters (7.06 ft3) bigger cargo space than BMW 1 Series (2014).