BMW 8 Series (G14) (2018) is 27 mm (1.06 inch) wider and 378 kg (833 lbs) lighter than Jeep Grand Cherokee (2016).
Jeep Grand Cherokee (2016) is 694 mm (27.32 inch) longer, 518 mm (20.39 inch) higher and has 677 liters (23.91 ft3) bigger cargo space than BMW 8 Series (G14) (2018).