As the Porsche 911 Turbo entered production in 1975 under the guise of its aggressively styled and distinctive 930-generation body shape, the 250 km/h coupé not only became the fastest road car available in Germany but also the fastest-ever from the marque at the time.

With one eye on the company’s motorsport endeavours, Porsche bosses earmarked the new 911 platform for racing as a replacement for the naturally aspirated Carrera RSR 3.0.

The suitability for competition in the Group 4 class was a natural fit for a race-derived interpretation of the 930 Turbo, yet Porsche engineers left no stone unturned as the first 934 was developed for testing.

Contemporary Group 4 regulations required a near-standard body configuration and a minimum weight of 1,120 kilograms, resulting in the removal of the stock seats, air conditioning, insulation, and other unnecessary items countered by the installation of a full aluminium roll cage, additional gauges, and racing equipment for application on th...