All of these changes created a coefficient of drag (Cd) of 0.36 for the two-door car (0.37 for the four-door), which was equal to the Cd of the new "aero" Ford Thunderbird. Ford endeavored to make every trim level look attractive, not just the top-of-the-line versions as had been customary in Detroit. When the Tempo was released in 1983 as a 1984 model, it became an instant success, with more than 107,000 two-door models and more than 295,000 four-door models being sold in the first year. Initial advertising featured a Tempo sedan performing a loop on a stunt track. The commercials touted the Tempo as being "America's all new aerodynamic sedan" and listed features such as "the world's most advanced automotive computer", called "EEC-IV", that was claimed to have the ability to monitor up to seven vital engine functions, and noted the interior to be roomier in the rear seat than a Mercedes-Benz 300D. Other ads featured the slogan "Pick up the Tempo of your life."