The Porsche 911 Turbo, introduced in 1975, would remain in production until 1989, and was sufficiently different from previous versions to earn a new 930 model number.

These were proper Supercars, amongst the fastest production cars available at the time, and are now felt by many to be the cars that defined the early eighties.

Developed initially for homologation purposes, the turbocharged 911 was first seen at the 1973 Paris Auto Show as a prototype, essentially to gauge reaction and went on sale a couple of years later as the 911(930) Turbo.

The basic engine underpinnings came from the Carrera 2.7 RS with the capacity increased to 3.0-litres and, of course, turbocharged using the vast amount of recent experience with forced air induction that Porsche had gained from their 917/30 Can-Am programme.

Externally distinctive with its whale tail rear spoiler, wide tyres, bulging wheel arches and macho stance, 930s were surprisingly civilised with air conditioning, electric windows, a le...