BMW 1 Series (2015) is 260 kg (573 lbs) lighter than BMW 3 Series Touring (2016).
BMW 3 Series Touring (2016) is 304 mm (11.97 inch) longer, 46 mm (1.81 inch) wider, 8 mm (0.31 inch) higher and has 135 liters (4.77 ft3) bigger cargo space than BMW 1 Series (2015).