BMW 1 Series (2014) is 295 kg (650 lbs) lighter than BMW 6 Series Gran Turismo (2018).
BMW 6 Series Gran Turismo (2018) is 730 mm (28.74 inch) longer, 154 mm (6.06 inch) wider, 128 mm (5.04 inch) higher and has 249 liters (8.79 ft3) bigger cargo space than BMW 1 Series (2014).