Enginechoices, however, have grown larger and include a fuel-efficient V6, a new 4.7-liter V8, a powerful HEMI V8 and a torque-happy turbodiesel, a first for the
Amajor change for the Grand Cherokee is under the hood. Three engines are offered, two of which are new to this vehicle. The biggest powerplant is the 5.7-liter, 325-horsepower Hemi currentlyPentastar3.6-liter Engine Specs, Performance & Fuel Economy. Horsepower has always been a strong point of the 3.6-liter, which ranges from 260 to 293 depending on model, trim, and year. However, gas mileage was less impressive on early models, ranging from a low of 16/22 city/highway on a 2011 Grand Cherokee to 19/26 on MoparPerformance 5.7L Gen-III Hemi Crate Engine 383 HP. Part Number: 312-68303088AB. Product Q&A View Now. Click image to zoom. Will this fit my 2012 Jeep Grand Cherokee overland Asked by: Johnny. HP103 High Performance Crate Engine 2003-2008 Chrysler Gen III HEMI 5.7L / 400HP / 400TQ (1) JeepGrand Cherokee SRT8® is the quickest, most powerful Jeep vehicle ever • Powered by the 6.1-liter HEMI® V-8 producing 420 horsepower (313 kW) and 420 lb.-ft. (569 N•m) of torque, the Jeep Grand Cherokee SRT8’s powertrain and performance-tuned ride and handling offer a world-class performance SUV experience . 219 269 36 374 55 91 142 259 184