BMW 3 Series Touring (2019) is 99 mm (3.90 inch) higher, 274 kg (604 lbs) lighter and has 80 liters (2.83 ft3) bigger cargo space than BMW 8 Series (G15) (2018).
BMW 8 Series (G15) (2018) is 130 mm (5.12 inch) longer and 75 mm (2.95 inch) wider than BMW 3 Series Touring (2019).