Kia Optima Sportswagon (2015) is 91 mm (3.58 inch) longer, 1045 kg (2,304 lbs) lighter and has 66 liters (2.33 ft3) bigger cargo space than Mercedes G-Class (2015).
Mercedes G-Class (2015) is 7 mm (0.28 inch) wider and 484 mm (19.06 inch) higher than Kia Optima Sportswagon (2015).