Ford GT (2020) is 141 mm (5.55 inch) wider than Opel Insignia Grand Sport (2017).
Opel Insignia Grand Sport (2017) is 134 mm (5.28 inch) longer, 345 mm (13.58 inch) higher, 20 kg (44 lbs) lighter and has 479 liters (16.92 ft3) bigger cargo space than Ford GT (2020).