BMW 5 Series Gran Turismo (2018) is 88 mm (3.46 inch) longer and 7 mm (0.28 inch) wider than Kia Optima Sportswagon (2015).
Kia Optima Sportswagon (2015) is 2 mm (0.08 inch) higher, 149 kg (328 lbs) lighter and has 23 liters (0.81 ft3) bigger cargo space than BMW 5 Series Gran Turismo (2018).