Chevrolet Impala (2016) is 216 mm (8.50 inch) longer, 41 mm (1.61 inch) higher and has 43 liters (1.52 ft3) bigger cargo space than Opel Insignia Grand Sport (2020).
Opel Insignia Grand Sport (2020) is 9 mm (0.35 inch) wider and 359 kg (791 lbs) lighter than Chevrolet Impala (2016).
