Kia Optima (2016) is 216 mm (8.50 inch) longer, 70 mm (2.76 inch) wider, 365 kg (805 lbs) lighter and has 68 liters (2.40 ft3) bigger cargo space than Land Rover Defender (2015).
Land Rover Defender (2015) is 556 mm (21.89 inch) higher than Kia Optima (2016).
