BMW 3 Series Touring (2015) is 170 kg (375 lbs) lighter than BMW 5 Series (2018).
BMW 5 Series (2018) is 310 mm (12.20 inch) longer, 56 mm (2.20 inch) wider, 70 mm (2.76 inch) higher and has 74 liters (2.61 ft3) bigger cargo space than BMW 3 Series Touring (2015).