Audi S4 (2016) is 18 mm (0.71 inch) longer and 12 mm (0.47 inch) wider than Opel Astra Sports Tourer (2015).
Opel Astra Sports Tourer (2015) is 129 mm (5.08 inch) higher, 230 kg (507 lbs) lighter and has 60 liters (2.12 ft3) bigger cargo space than Audi S4 (2016).
