ACL Porsche 906

After the victorious and race inspired Porsche 904 Carrera GTS in 1964-65, the newly appointed Ferdinand Piech, grandson of Ferdinand Porsche, at the helm of a now more dedicated Racing Department, was ready to build a more purposefully built race car than the heavy 904 when facing the Ferrari 206 Dino. To enter the racing class 'Group 4' Porsche needed to build 50 race cars within a year according to the rules. This gave us in 1966 the Porsche 906, also referred to as the Porsche Carrera 6.

The Porsche 906 was to be the last legal road going Porsche Race Car until the 1996-98 Porsche GT1.
Lotus suspension components were used and street legal 15 inch wheels were fitted, but their 5-bolt design didn’t help when needing to change tires during a race.
Sculpted for the first time in a wind tunnel, the Porsche 906 had a more rakish and Sport Prototype shape than the 904 GTS. The headlights were still plexiglass covered, but the whole front-end and its chiseled air-intake appeared flatter and lower than the 904, which also provided downforce on the front axle.

Also in 1966 Porsche started to build nine 906 Prototypes to enter in 'Group 6 Prototype' Class as Factory cars and were named Porsche 906 E, meaning 'Einspritzung' or 'Injection'. These prototypes had an early Bosch Fuel Injection system that when tuned to its best produced up to 220 hp at 8100 rpm giving a 280 km/h / 174 mph top speed on the Mulsanne Straight.