To close out its 964-series 911 Turbo, Porsche built the last 93 as “S” models, and 39 of those were made as the X85 Flachbau (“Flat-nose”) for the U.S. market. The Turbo S X85’s 380-horsepower 3.6-liter engine was basically the one used in the IMSA Bridgestone North American Supercar race series. The only X85 that came painted in Speed Yellow is on offer at RM Sotheby’s Scottsdale auction with a pre-sale estimate of $800K-$1M.
