Aston Martin Vantage (2016) is 8 mm (0.31 inch) wider than Opel Insignia Sports Tourer (2020).
Opel Insignia Sports Tourer (2020) is 531 mm (20.91 inch) longer, 253 mm (9.96 inch) higher, 10 kg (22 lbs) lighter and has 260 liters (9.18 ft3) bigger cargo space than Aston Martin Vantage (2016).