The 997 Turbo was presented in February 2006 at the Geneva Motor Show. The engine was based on the rugged and reliable 964/GT1 design rated 493hp and 620 Nm. The turbochargers are fitted with a two-stage resonance intake system.
The engine uses two BorgWarner VTG turbos, a first for Porsche. The Variable Turbine Geometry incorporates guide vanes on the turbine wheel that change their angle of attack with exhaust speed, reducing boost lag at low speeds while opening up to prevent excessive back pressure at high RPMs. Such variable geometry turbines were previously only available on diesel engines.
The optional Sport Chrono package allows the 911 Turbo to overboost for ten seconds, increasing peak torque over a narrow RPM range.
According to official Porsche figures, the 997 Turbo accelerates to 100 km/h in 3.7 seconds with the manual transmission, and 3.4 seconds with the Tiptronic S transmission. The 997 Turbo has an official top speed of 318 km/h, though Jeremy Clarkson achieved an indicated speed of 322 km/h during his 2008 video special, Clarkson: Thriller.
997 Turbo Cabriolet
Porsche AG announced on May 7, 2007 that the 911 Turbo Cabriolet would go on sale in September 2007. The Porsche 997 Turbo Cabriolet became one of the fastest convertible sports cars in production. It is capable of similar top speeds and acceleration to the standard Porsche 997 Turbo Coupe, a notable feat due to the typical problems associated with convertible variants of hardtop coupés, such as the poor aerodynamics of a soft top, a lack of torsional rigidity, and the consequential weight increase from structural members.
Turbo S & Turbo S Cabriolet
This higher spec Limited Edition Turbo was released at the Geneva Motor Show in March 2010. Available only with a 7-speed PDK transmission, the Turbo S boosts power by 30hp to a total of 523hp and an impressive torque of 700 Nm. It's the Porsche Fastest Released production vehicle to date. 0-to-100 km/h acceleration: 2.6 seconds. Maximum torque of 516 lb-ft in the 911 Turbo S models is available between 2,100 rpm and 4,250 rpm. The 911 Turbo S models, by contrast, are configured to operate with a higher boost pressure level, which means that their maximum torque of 516 lb-ft is available for an unlimited period.
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| Porsche 911 (997) Turbo Cabriolet - 2010 |
