Acura RLX (2018) is 26 mm (1.02 inch) longer and 326 kg (719 lbs) lighter than BMW 5 Series Gran Turismo (2015).
BMW 5 Series Gran Turismo (2015) is 10 mm (0.39 inch) wider, 93 mm (3.66 inch) higher and has 78 liters (2.75 ft3) bigger cargo space than Acura RLX (2018).