The engine is a 2.3 liter inline 4 cylinder. It's a Duratec engine, much like that found in the Contour. Ford has been using the 2.3 in their Rangers for a couple years now. Ford claims 145 hp @ 5750 / 149 ftlb @ 4200. As far as the PZEV that means Partial Zero Emission Vehicle. Ford's latest entry to the Greener Pastures of California, New York, and Mass. The fuel tank is enlarged, the fuel lines are stainless steel, the engine actually spins "Backwards" and the headers are on the back side of the engine. I'll get some pics in a few minutes.