BMW 1 Series (2014) is 254 kg (560 lbs) lighter than BMW 3 Series Touring (2018).
BMW 3 Series Touring (2018) is 283 mm (11.14 inch) longer, 63 mm (2.48 inch) wider, 18 mm (0.71 inch) higher and has 135 liters (4.77 ft3) bigger cargo space than BMW 1 Series (2014).