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German motorists are eager to convert their cars to run with LPG (Liquified Petroleum Gas) and CNG (Compressed Natural Gas). However, unless your next car purchase comes with the LPG/CNG conversion as standard, you should be careful where you get your car converted, according to TÜV Rheinland. The group issued a note of warning stating that several poorly performed conversions had been detected recently. Aftermarket conversions aren't cheap: LPG conversion costs from €1,500 to €2,

Audi has announced a record-beating A4 that has a maximum speed of 327.2 km/h (203 mph). The unusual feature of this A4 is that it runs on biogas, naturally obtained from the anaerobic fermentation of switchgrass. The experiment was performed to promote the use of biogas as an alternative fuel. Bear in mind that Germany imports almost all the country's gas needs from Russia, so a biologic alternative has a lot of domestic support. Regarding the technical side of the experiment, the A4 was a stan

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