Buick Regal Sportback (2019) is 202 mm (7.95 inch) longer and 48 mm (1.89 inch) wider than Opel Astra Sports Tourer (2017).
Opel Astra Sports Tourer (2017) is 80 mm (3.15 inch) higher, 225 kg (496 lbs) lighter and has 70 liters (2.47 ft3) bigger cargo space than Buick Regal Sportback (2019).
