Kia Optima (2016) is 268 mm (10.55 inch) longer and 154 kg (340 lbs) lighter than Land Rover Discovery (2015).
Land Rover Discovery (2015) is 35 mm (1.38 inch) wider, 252 mm (9.92 inch) higher and has 415 liters (14.66 ft3) bigger cargo space than Kia Optima (2016).