25/10/2008 01:49. The search for an less toxic alternative fuels is leading in many promising directions, one of which is bio-gas. Effectively a form of natural gas made from plants, the fuel was used this week to speed a modified B7 Audi A4 quattro to a bio-gas world speed record of 203.3mph (327.2km/h) on a test track in Germany.

Despite running on a mixture of methane and other gases generated by the controlled decomposition of grass clippings and sawdust, the Audi A4 used for the speed record generates a massive 585hp (430kW) from its overbored twin-turbo 3.0L engine. The project was completed as part of the Community Center of Excellence program at TUV Rheinland, with... // Motor Authority