Porsche's flagship 911 sports-car line revives glass-roof Targa coupes for 2007. Continued are rear-wheel-drive Carrera, Carrera S, and GT3 models, plus all-wheel-drive Carrera 4, Carrera 4S, and Turbo models. Carreras come as coupes and as Cabriolet convertibles with a power soft top and heated glass rear window. The GT3 and Turbo are coupes. The new Targa 4 and 4S are AWD coupes with a 4.8-sq-ft power-sliding roof panel made of translucent glass. All 911s have rear-mounted, horizontally opposed 6-cyl engines. Carrera and Targa 4 have 325 hp, Carrera S and Targa 4S models have 355, GT3 415, the Turbo 480. A 381-hp Power Kit is available for Carrera S/Targa S. A 6-speed manual transmission is standard. A 5-speed automatic with manual shift gate and steering-wheel controls is available except on GT3. Also standard: ABS, traction/antiskid control, front side airbags, and curtain side airbags. The Turbo and GT3 have specific suspension tuning, brakes, and styling.