Porsche 910

The Porsche 910 or Carrera 10 are prototype race cars built by Porsche in late 1966 and early 1967 as less restricted evolutions of the "mass produced" (65 in total) street legal 2 litre Porsche 906 Carrera 6 that were made in early 1966 to FIA Group 4 Sportscar homologation requirements that included luggage space and spare wheel.

Unlike the 906, that also had carried over Porsche 904 parts, the 910 was not developed with the considerations necessary for FIA/CSI homologation, public road use, racing by customers, or economy in general. The chassis is a steel space frame design covered by a lightweight fiberglass body, fitted with up to date Formula 1 suspensions parts, wheels, tyres, different engines, and bodies. As the 906 had gullwing doors with hinges on the roof that had issues with remaining properly closed, the 910 doors hinged forward, which also allowed that the roof could be removed. The 910s were optimized for various use cases, as regular 906-like short tail (Kurzheck KH) cars, as low weight open top spyders for hillclimbing and twisty courses like Targa Florio and Nürburgring, or with low drag long tail (Langheck LH) coupé bodies for fast tracks like Monza, Spa, Le Mans.

Introduced in the summer of 1966 at hillclimbs, the 910 was succeeded at the June 1967 Le Mans 24h by the more aerodynamic Porsche 907 with a smaller cabin in which the driver sits on the right side, as most road race tracks are run clockwise and sitting on the inside of a corner is better for weight distribution and orientation.

When the minimum number for sportscars was lowered to 25 for 1969, the over two dozen Porsche 910 prototypes that had been made since 1966 were belatedly homologated in January 1969 as sportscars to let privateers race them for class wins and in minor events. Due to close relation with the 906, additional requirements like luggage space and spare wheel could be met easily.