BMW 3 Series Touring (2015) is 90 mm (3.54 inch) higher, 378 kg (833 lbs) lighter and has 145 liters (5.12 ft3) bigger cargo space than BMW 8 Series (G14) (2019).
BMW 8 Series (G14) (2019) is 210 mm (8.27 inch) longer and 91 mm (3.58 inch) wider than BMW 3 Series Touring (2015).