In 1986, the Porsche 959 was the world’s quickest road legal item automobile. Some 337 of those road-going monsters were built but not one of them was a factory-finished convertible. Regardless of what you could have heard or observed on forums, these a automobile was in no way sanctioned by Porsche. There was a one-off “Speedster” built by Auto-Becker for your 1989 Frankfurt Motor Demonstrate but that’s about it.