Acura RLX (2019) is 189 mm (7.44 inch) longer, 127 mm (5.00 inch) higher, 119 kg (262 lbs) lighter and has 72 liters (2.54 ft3) bigger cargo space than BMW 8 Series (G14) (2018).
BMW 8 Series (G14) (2018) is 12 mm (0.47 inch) wider than Acura RLX (2019).