Chrysler manufactured the 4.7-liter, liquid-cooled gasoline engine, also called the Powertech, from 1999 to 2013. It was used in Dodge, Jeep and Chrysler vehicles, including the Chrysler Aspen; Dodge Dakota, Ram, Durango and Nitro; and Jeep Grand Cherokee, Liberty and Commander; and Mitsubishi Raider. The first generation 4.7L engine was released in 1999, followed by two updates, released in 2002 and 2008, respectively.
First Generation Specifications
The engine displacement is 4.701 cu.-cm., or 287 cu.-in. The bore by stroke is 3.66 by 3.4 inches. The compression ratio is 9.5 to 1. Maximum engine speed is 6,000 rpm and top horsepower is 235 at 4,600 rpm. Torque ranges slightly among models, from 290 to 305 foot-lbs. Fuel efficiency is approximately 16 miles per gallon.