Clean Diesel
Volkswagen has been selling low sulphur diesel-powered engines for the European market since 2003. VW developed Turbocharged Direct Injection (TDI) technology for diesel engines, and it offers a wide array of TDI powertrains. As modern diesel fuel economy is 30 percent higher than gasoline engines, a proportional reduction of greenhouse gas emissions is achieved with clean diesel technology. Volkswagen is also developing hybrid technology for diesel-electric. A VW Golf turbo-diesel hybrid concept car was exhibited at the 2008 Geneva Motor Show, which has a fuel economy of 70 mpg (3.3 litres per 100 km).
Volkswagen of America Inc. promotes its work in developing "clean diesel", and other fuel-efficient technologies, to increase U.S. sales to environmentally conscious consumers. One of the vehicles being promoted is the 2009 clean-diesel Jetta TDI, which has a 16-valve, four-cylinder common rail direct injection engine which reduces emissions by 90 percent. The same vehicle in 2009 won "Green Car of the Year." Volkswagen also claims that this model has the advantage of fuel economy in the mid-50s and mid-40s in city conditions. Stefan Jacoby, CEO of America's Volkswagen, said that it will be released in a sedan and sport-wagon model in May 2008 in California, becoming the first 50-state clean diesel offering.
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