Kia Optima Sportswagon (2020) is 13 mm (0.51 inch) longer than Opel Insignia (2015).
Opel Insignia (2015) is 224 mm (8.82 inch) wider, 28 mm (1.10 inch) higher, 168 kg (370 lbs) lighter and has 100 liters (3.53 ft3) bigger cargo space than Kia Optima Sportswagon (2020).