Opel Insignia Grand Sport (2020) is 7 mm (0.28 inch) longer, 47 mm (1.85 inch) wider, 483 kg (1,065 lbs) lighter and has 125 liters (4.41 ft3) bigger cargo space than Toyota Mirai (2019).
Toyota Mirai (2019) is 82 mm (3.23 inch) higher than Opel Insignia Grand Sport (2020).
