Opel Insignia Grand Sport (2020) is 634 mm (24.96 inch) longer, 47 mm (1.85 inch) wider and has 110 liters (3.88 ft3) bigger cargo space than Seat Leon (2014).
Seat Leon (2014) is 4 mm (0.16 inch) higher and 156 kg (344 lbs) lighter than Opel Insignia Grand Sport (2020).
