A secret Porsche 911 prototype on video
An unseen Porsche unveiled
The Porsche museum has unveiled another rarity. The concept car based on a 911 was the result of an experiment in decreasing air-drag.
The car doesn’t look that modified. It received a smooth front similar to that of the 959 as well as smooth rim covers, a new rear bumper and side skirts, and a spoiler unlike any on their previous models. Even the right-hand side mirror has been removed in order not to obstruct air flow. It was a success: the air drag coefficient dropped from 0.40 to 0.27 which is still remarkable today. These days, from an aerodynamic point of view, the most preferential drag coefficient of a mass production car is 0.23, but the average is still over 0.3.
The results inspired the shape of the next two 911 series, the 964 made from 1989, and the following 993.