Porsche continues to unveil a host of new models for the updated 911. The company has now previewed their more powerful 911 Turbo and 911 Turbo S ahead of the North American International Auto Show (NAIAS).

Like the updated Carrera models unveiled a few months back, visual changes made to the revamped 911 include revised air intakes and new LED day time running lights. Subtle changes were also made to the 911's front fascia. At the side it gets new door handles and the tail lights get minor tweaks. Exclusive to the turbo model is a 20 inch wheel option, restyled for 2016. Available body styles include the coupe and cabriolet.

Minor tweaks for the updated 911 Turbo and Turbo S interiors

Minimal changes have been made to the interior and for 2016, the 911 gets a new sport steering wheel. The new wheel also comes with a rotary mode selector that has Normal, Sport, Sport Plus, and Individual settings to suit the driver's preference. The Bose sound system is standard for the 911 Turbo and Turbo S and the Porsche Communication Management system has been updated as well.

Speaking of standard equipment, the Sport Chrono Package is standard for the Turbo and Turbo S, now with a new Sport Response feature. With a push of a button the car "preconditions the engine and gearbox for the best possible responsiveness” and delivers overboost for up to 20 seconds. The Porsche Stability Management (PSM) system programs have also been recalibrated for drivers to reach a higher limit threshold with the security of the system.

Minor model change brings in major power upgrade for 911 Turbo and Turbo S

The biggest news for the 2016 911 Turbo and Turbo S is the horsepower hike for both models. The 3.8 liter, twin-turbo flat six engine found in both cars get a 20 horsepower hike. Despite the additional power, Porsche claims the tweaked engine is slightly more efficient than the outgoing model. The standard 911 Turbo now puts out 540 PS while the Turbo S model punches out 580 PS. Both variants are mated to Porsche's dual clutch transmission (PDK) and power is transferred to all four wheels.

With the all wheel drive system and the power hike, Porsche claims the 2016 911 Turbo and Turbo S models can now sprint to 100 km/h in 3 seconds and 2.9 seconds respectively. The claimed top speed for the standard 911 Turbo stands at 320 km/h. The Turbo S model breaks the 320 km/h barrier with a claimed top speed of 330 km/h.