Acura RLX (2018) is 206 mm (8.11 inch) longer and 61 mm (2.40 inch) wider than BMW 3 Series Gran Turismo (2021).
BMW 3 Series Gran Turismo (2021) is 43 mm (1.69 inch) higher, 224 kg (494 lbs) lighter and has 99 liters (3.50 ft3) bigger cargo space than Acura RLX (2018).