Honda Civic Tourer (2014) is 10 mm (0.39 inch) higher, 280 kg (617 lbs) lighter and has 114 liters (4.03 ft3) bigger cargo space than Kia Optima (2017).
Kia Optima (2017) is 320 mm (12.60 inch) longer and 90 mm (3.54 inch) wider than Honda Civic Tourer (2014).