Opel Insignia Grand Sport (2017) is 615 mm (24.21 inch) longer, 47 mm (1.85 inch) wider and has 110 liters (3.88 ft3) bigger cargo space than Seat Leon (2016).
Seat Leon (2016) is 4 mm (0.16 inch) higher and 152 kg (335 lbs) lighter than Opel Insignia Grand Sport (2017).
