Cadillac XTS (2016) is 433 mm (17.05 inch) longer and 39 mm (1.54 inch) wider than Opel Astra Sports Tourer (2015).
Opel Astra Sports Tourer (2015) is 34 mm (1.34 inch) higher, 342 kg (754 lbs) lighter and has 30 liters (1.06 ft3) bigger cargo space than Cadillac XTS (2016).
