The E25 Turbo concept car was built by BMW as a celebration for the 1972 Summer Olympics in Munich. It was designed by Paul Bracq, with gullwing doors and was based on a modified 2002 chassis with a mid-mounted engine. The Turbo featured a 200 hp turbocharged version of the engine from the BMW 2002, foam filled front and rear sections to absorb impact, side impact beams, a braking distance monitor utilizing radar, and a futuristic cockpit. Only two were ever built. BMW later used the Turbo's design themes on the BMW M1, the 8-Series, the Z1 and the 2008 M1 Homage Concept.

Source: Wikipedia, 2012