Word came down last month that rival German automakers would horn in on Mercedes-Benz's Bluetec clean diesel program. Today, Audi made it official that such a hookup with DaimlerChrysler is forthcoming, with the first Bluetec engines arriving at Audi dealerships in 2008. Audi will still refer to its diesel powerplants under the TDI moniker. And yes, the new engines will satisfy emissions regulations in all 50 states, via Audi's own emissions control technology. Thanks for asking. – Mike Spinelli

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