Acura RLX (2015) is 616 mm (24.25 inch) longer, 170 mm (6.69 inch) wider, 10 mm (0.39 inch) higher and has 35 liters (1.24 ft3) bigger cargo space than Kia Rio (Sedan) (2015).
Kia Rio (Sedan) (2015) is 691 kg (1,523 lbs) lighter than Acura RLX (2015).