GMC Acadia (2015) is 258 mm (10.16 inch) longer, 346 mm (13.62 inch) higher and has 640 liters (22.60 ft3) bigger cargo space than Opel Insignia (2017).
Opel Insignia (2017) is 80 mm (3.15 inch) wider and 542 kg (1,195 lbs) lighter than GMC Acadia (2015).
