Acura RLX (2014) is 148 mm (5.83 inch) longer, 126 mm (4.96 inch) higher, 149 kg (328 lbs) lighter and has 72 liters (2.54 ft3) bigger cargo space than BMW 8 Series (G14) (2020).
BMW 8 Series (G14) (2020) is 12 mm (0.47 inch) wider than Acura RLX (2014).