http://en.wikipedia.org/wiki/Partner...on_of_Vehicles
"The Partnership for a New Generation of Vehicles was a cooperative research program between the U.S. government and major auto corporations, aimed at establishing U.S. leadership in the development of extremely fuel-efficient (up to 80 mpg) vehicles while retaining the features that make them marketable and affordable. The partnership, formed in 1993, involved 8 federal agencies [1], the national laboratories, universities, and the United States Council for Automotive Research (USCAR), which comprises DaimlerChrysler, Ford Motor Company and General Motors Corporation. On track to achieving its objectives, the program was cancelled in 2001 at the request of the automakers, with some of its aspects shifted to the much more distant FreedomCAR program."
http://www.allpar.com/model/intrepid-esx3.html
Intrepid ESX-3
The ESX3 costs only about $7,500 more than a comparable gasoline-powered car, down from a $15,000 premium with the ESX2, and $60,000 with the ESX. The ESX3's mild hybrid electric (or "mybrid") powertrain combines a clean diesel engine, electric motor, and lithium-ion battery to achieve 72 miles per gallon (3.3 liters/100 km). That is two miles per gallon better than the fuel efficiency of its predecessor, the ESX2 in 1998, and close to PNGV's goal of up to 80 mpg (2.9 liters/100 km).