Ford Mustang (2017) is 60 mm (2.36 inch) wider than Opel Insignia Sports Tourer (2020).
Opel Insignia Sports Tourer (2020) is 129 mm (5.08 inch) longer, 119 mm (4.69 inch) higher, 212 kg (467 lbs) lighter and has 236 liters (8.33 ft3) bigger cargo space than Ford Mustang (2017).