INFINITI M (2014) is 32 mm (1.26 inch) longer and 1 mm (0.04 inch) higher than Opel Insignia Sports Tourer (2017).
Opel Insignia Sports Tourer (2017) is 12 mm (0.47 inch) wider, 795 kg (1,753 lbs) lighter and has 138 liters (4.87 ft3) bigger cargo space than INFINITI M (2014).