The document lists specifications for various Porsche 911 turbo models from 1980 to 2010, including the iconic 911 turbo with a MSRP of $135,500 and 500 horsepower. It provides details on 911 turbo and turbo S models from the 930, 993, 996, and 997 generations as well as cabriolet versions. The document was compiled by Alex J Mitchell using information from Porsche and various internet sources.