BMW 1 Series (2015) is 304 kg (670 lbs) lighter than BMW 5 Series (2020).
BMW 5 Series (2020) is 614 mm (24.17 inch) longer, 102 mm (4.02 inch) wider, 57 mm (2.24 inch) higher and has 170 liters (6.00 ft3) bigger cargo space than BMW 1 Series (2015).