Porsche ≫ 911991 II Porsche 911 Turbo S cabriolet facelift photo galleryby Joshua ThompsonFor the facelifted 991 II version of the Porsche 991 Turbo S cabrio, the company has increased power from the 3.8-liter twin turbo H6 to 427kW (580hp). ◄ PrevNext ►Credit: Porsche 991 II Porsche 911 Turbo S cabriolet - rear Tags:911991991 iicabrioletporscheturbo stype 991type 991 ii