Porsche Considering Diesel-Powered Cayenne and Panamera Models for the U.S.

Porsche officials are exploring the possibility of adding diesel variants to the company's North American lineup to help meet the growing demand for fuel-efficient cars. On sale in Europe since early 2009, the Cayenne diesel could be one contender for the job and may be followed by the Panamera with a diesel engine and a gasoline-electric hybrid powertrain. “We are discussing internally if we