BMW 1 Series (2014) is 70 mm (2.76 inch) higher and 324 kg (714 lbs) lighter than BMW 8 Series (G15) (2020).
BMW 8 Series (G15) (2020) is 483 mm (19.02 inch) longer, 154 mm (6.06 inch) wider and has 60 liters (2.12 ft3) bigger cargo space than BMW 1 Series (2014).