The 2015 Buick Regal GS AWD is equipped with a [n]Gasoline 2.0L I-4 engine that can produce up to 259 hp @ 5300 rpm horsepower and a maximum torque of 295 lb-ft @ 2500 rpm.

The GS version offered buyers sportier and more aggressive styling than lower-end variants, as well as a more powerful engine and tweaked underbody components to help enhance its handling. The GS was ...