Opel Insignia Grand Sport (2017) is 42 mm (1.65 inch) longer and 820 kg (1,808 lbs) lighter than Porsche Cayenne (2018).
Porsche Cayenne (2018) is 91 mm (3.58 inch) wider, 233 mm (9.17 inch) higher and has 180 liters (6.36 ft3) bigger cargo space than Opel Insignia Grand Sport (2017).
