BMW 8 Series (G14) (2020) is 395 mm (15.55 inch) longer and 81 mm (3.19 inch) wider than BMW X1 (2016).
BMW X1 (2016) is 259 mm (10.20 inch) higher, 463 kg (1,021 lbs) lighter and has 155 liters (5.47 ft3) bigger cargo space than BMW 8 Series (G14) (2020).