BMW 1 Series (2015) is 365 kg (805 lbs) lighter than BMW 5 Series Gran Turismo (2020).
BMW 5 Series Gran Turismo (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).