Buyers’ Guide: Porsche 911 Turbo and Turbo S 993

Buyers’ Guide: Porsche 993 Turbo and Turbo S. Last of the air-cooled 911 Turbos. End of a turbo era. The 993 was the last of the air-cooled 911s, which makes the 993 Turbo the last of the air-cooled Turbo 911s. It’s also the most sophisticated of the air-cooled cars, too, mixing twin turbos with a permanent four-wheel drive system. Typically of the 911 Turbo it mixed performance and practicality for the ultimate Super 911.