At first glance, a few design changes in the front and rear are the only differences between the 2017 Porsche 911 Turbo and last year’s model. Not that the 911 Turbo needed much changing in the first place. Next year’s 911 Turbo and Turbo S models will, however, deliver 540 and 580 horsepower, respectively. That’s 20 more horsepower a piece, along with a 0-60 miles per hour time of less than 3 seconds and tops speeds of 198 miles per hour and 205 miles per hour, respectively. See both models in person at the 2016 Detroit Auto Show next month or learn more at Porsche.