Kia Optima Sportswagon (2018) is 4 mm (0.16 inch) wider than Opel Insignia Sports Tourer (2017).
Opel Insignia Sports Tourer (2017) is 58 mm (2.28 inch) longer, 43 mm (1.69 inch) higher, 226 kg (498 lbs) lighter and has 120 liters (4.24 ft3) bigger cargo space than Kia Optima Sportswagon (2018).