The final air-cooled generation of the Porsche 911, codenamed 993, is a desirable machine not only because it's the last of its kind, but also because it's arguably the best. Yet for all its plaudits, ...

One of the rarest production Porsche 911s is set to cross the auction block in Birmingham next month. Only 14 examples of the 993-generation 911 Turbo were made in Cabriolet guise – and only five cars ...