Chevrolet Impala (2020) is 200 mm (7.87 inch) longer than Opel Insignia Sports Tourer (2015).
Opel Insignia Sports Tourer (2015) is 2 mm (0.08 inch) wider, 17 mm (0.67 inch) higher, 124 kg (273 lbs) lighter and has 27 liters (0.95 ft3) bigger cargo space than Chevrolet Impala (2020).