Arias Pistons 12.5:1 Compression 82mm Bore Honda B-series on 2040-parts.com

Concept Car of the Week: Mercedes-Benz C111, C111-II and C111-IID

In 1962, Mercedes-Benz launched a research program to investigate the development of the Wankel rotary engine and its potential both on the road and track. While the early mule wasn't a looker, the prototype's design continued to evolve until a public unveiling of the C111-I concept, designed by Bruno Sacco, at the 1969 Frankfurt motor show. The coupé may have looked like the systematic further development of the Sport Light models from the ‘50s with its gullwing doors, but it wasn't a design study for a new SL.

Concept Car of the Week: Ford Mustang RSX Concept (1979)

In the late ‘70s, Ford commissioned carrozzeria Ghia to build a concept car based on the Fox platform to help promote its third generation Mustang. Probably inspired by the Escort RS's success at the World Rally Championship, the concept was dubbed RSX – standing for Rally Sport Experimental – and the Fox platform-based Mustang was modified as a rally car. To improve the handling, the wheelbase from the Fox was shortened by 142mm, the track was widened by around 25mm at the rear while the ride height was increased for off-tarmac stages of European rallies.

The Porsche Le Mans legends - the cars and men in pictures

By Ben Pulman Motoring Issues 14 June 2014 16:11 Between 1970 and 1998 Porsche won Le Mans 16 times. As Porsche returns to La Sarthe this weekend for the famous Le Mans 24 hours, we look back at the most famous cars, race directors and drivers who helped create the Porsche legend. We interviewed the team's most famous drivers and engineers ahead of Le Mans in the June 2014 issue of CAR magazine.