BMW 1 Series (2014) is 72 mm (2.83 inch) higher, 433 kg (955 lbs) lighter and has 10 liters (0.35 ft3) bigger cargo space than BMW 8 Series (G14) (2020).
BMW 8 Series (G14) (2020) is 474 mm (18.66 inch) longer and 154 mm (6.06 inch) wider than BMW 1 Series (2014).