Simply put, the Turbo version of the 911 convertible makes the Carrera S version look like a slouch, even though it isn't.

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Corralled in the engine bay are 125 extra horses for a total of 480 from the 3.6-liter flat six-cylinder. Torque is rated at 460 pound-feet from a low 1,950 to 5,000 rpm. The Sport Chrono Package Turbo, which offers an overboost function, further raises the torque to 505 pound-feet at the touch of a button.

Responsible for the extra firepower are twin turbochargers featuring Variable Turbine Geometry. Acceleration from zero to 60 miles per hour is achieved in just 3.8 seconds for the manual six-speed transmission and 3.5 seconds for the optional Tiptronic S five-speed automatic. The top speed is 193 mph.

When you go fast, you may also need to stop fast, so Porsche equips the 911 Turbo with six-piston brakes up front and four-piston brakes out back, all with aluminum-fixed calipers and ventilated discs. For more stopping power, the Porsche Ceramic Composite Brake system is optional.

Porsche Active Suspension Management, with normal and sport settings, is standard.

A spoiler rises out of the rear body work to reduce lift at high speeds.

The convertible's drag coefficient is remarkably low at just 0.31.

Two-tone 19-inch alloy wheels show the world the 911 Turbo means business.

Like other 911 convertibles, the soft-top roof can be lowered in just 20 seconds at the touch of a button. A standard detachable wind deflector reduces turbulence and noise in the passenger compartment at high speeds, while a lightweight aluminum hard-top is an option.

Many interior amenities come standard including automatic climate control, an on-board computer, HomeLink system and 12-speaker Bose surround-sound audio system.