The Porsche 911 was revealed – as the 901 – at the Frankfurt Motor Show in September 1963, and went on sale the following year with the more familiar name.

In the six decades since then, there have been many 911s which could be called extreme, either in overall terms or in the context of their time.

Acknowledging that there are other possible candidates, we’ve compiled a list of 20 (all designed for road use – no race or rally cars here) and present them to you in order of the years they first became available