1999-2008 Porsche 911: Year-to-Year Changes

2000 Porsche 911: The 911's six-cylinder engine gained 4 horsepower this year. Porsche's Stability Management antiskid system was standard on the all-wheel-drive Carrera 4, and newly available as an option for the rear-drive Carrera 2. The system was designed to apply individual brakes as needed, to counteract skids in turns.

2001 Porsche 911: Porsche revived the Turbo coupe as an early 2001 model, with a twin-turbo 3.6-liter engine that produced 415 horsepower. For the first time, Turbos could be equipped with an automatic transmission. Carreras kept the 3.4-liter engine. Turbo 911s featured bolder front/rear styling, standard 18-inch wheels (versus 17s on Carreras), and a "biplane" rear spoiler designed to enhance high-speed stability.

2002 Porsche 911: Revised styling and more power arrived for 2002. Base models switched from a 3.4-liter engine to a 3.6-liter, rated at 320 horsepower rather than 300. Also new for 2002 was the GT2, essentially a rear-drive Turbo with a 456-hp engine, special suspension, and fewer standard luxuries--all aimed at lowering weight and increasing performance. The GT2 also introduced the industry's first Ceramic Composite brakes. Interior materials were upgraded this year, front seatbelt pretensioners were installed, and convertibles switched from plastic to glass for the back window. All models except the GT2 got an optional navigation system and five-speed automatic transmission.

2003 Porsche 911: Optional "Horsepower Kits" boosted the base engine to 345 hp and the turbo to 450 hp. Standard audio system exchanged its cassette player for a single-disc in-dash CD player. Arriving late in the year was the GT3, a $99,900 rear-drive model with a 380 hp nonturbo engine.

2004 Porsche 911: Porsche's trademark sports car offered an expanded model lineup for 2004. New were the 40th Anniversary Carrera coupe, a Cabriolet version of the Turbo, and a new model called the GT3. The 40th Anniversary model has unique interior and exterior styling, upgraded suspension and 345 horsepower. The GT3 sports 380 horsepower, a lightened body, and special aerodynamics. The GT2 gained revised suspension tuning and 21 horsepower, now 477.

2005 Porsche 911: The 911 lineup for 2005 blended redesigned rear-wheel-drive models with carryover all-wheel-drive models. All had a rear-mounted, horizontally opposed 6-cyl engine. The redesigned 2005 models were available as coupes and convertible Cabriolets. Compared to the carryover models, the redesigned coupe and convertible had subtly altered styling and dimensions and a revamped interior. The redesigned Carreras introduced additional side airbags that deployed from the windowsills for head protection.

2006 Porsche 911: The midyear return of a turbocharged model made news for Porsche's flagship sports car lineup. Turbos were launched as 2007 models and were AWD coupes.

2007 Porsche 911: Porsche's flagship car revived glass-roof Targa coupes for 2007. The new Targa 4 and 4S were AWD coupes with a 4.8-sq-ft power-sliding roof panel made of translucent glass.

2008 Porsche 911: The 2008 Porsche 911 added a turbocharged convertible model to its roster but was otherwise unchanged.