Maserati Ghibli (2020) is 58 mm (2.28 inch) longer and 90 mm (3.54 inch) wider than Opel Insignia Sports Tourer (2015).
Opel Insignia Sports Tourer (2015) is 53 mm (2.09 inch) higher, 270 kg (595 lbs) lighter and has 51 liters (1.80 ft3) bigger cargo space than Maserati Ghibli (2020).
