BMW 1 Series (2015) is 82 mm (3.23 inch) higher, 543 kg (1,197 lbs) lighter and has 10 liters (0.35 ft3) bigger cargo space than BMW 8 Series (G14) (2019).
BMW 8 Series (G14) (2019) is 514 mm (20.24 inch) longer and 137 mm (5.39 inch) wider than BMW 1 Series (2015).