Forget the smog-spewing oil-burners of old--a whole new generation of cleaner diesel cars is on its way to U.S. showrooms. In anticipation of the new wave of European-sourced diesels, we got our hands on an Euro-spec Audi A6 3.0 CDI to see how it compared with its gasoline equivalent. Having put it through a number of highly scientific emissions tests and the obligatory zero-to-60 run, we have to admit to being fairly impressed. Check out our photos of the Euro-spec Audi A6 diesel.
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