190 hp, 1,991 cc twin-plug, OHC, air-cooled, flat six-cylinder engine with twin Weber 46IDA3C carburettors, five-speed synchromesh gearbox, independent front suspension with double wishbones and coil springs, independent rear multi-link suspension with coil springs, and hydraulic disc brakes.

Wheelbase: 2,300 mm Porsche’s Type 904, officially called the Carrera GTS because Porsche and Peugeot were in dispute over numeric designations with “0” in them, succeeded the RSK Type 718 as the last sports-racing iteration of the 356 series.

Developed after Porsche left Formula One in 1962, the 904 (as it soon became popularly known) was also the last full-competition Porsche that could be readily driven on the street.

The 904’s designer was 28-year-old Ferdinand Alexander “Butzi” Porsche III, the son of company chairman “Ferry” Porsche.

“It was my favourite”, he later told Porsche historian Karl Ludvigsen, “Because I did it alone and there wasn’t this fight to change it or make it newer.

I...