The Cayenne Turbo S puts the hammer down, providing an additional 50 horsepower and a whopping 88 lb-ft of torque, and has fattened that torque curve in many areas to provide brutal, Mercedes-smiting acceleration. The gains were made thanks to a reprogrammed ECU and a new sport exhaust system with better airflow. Porsche says that the Turbo S can accelerate to 60 mph in 4.8 seconds, down from 5.1 seconds with the regular Turbo, and will continue to accelerate until 174 mph is reached, 3 mph higher than the standard SUV. And these upgrades come at no cost to fuel economy.
Source: Automobile Magazine