Thehigh-performance SRT8 model has a 420-horsepower 6.1-liter Hemi V8 and can accelerate from 0 to 60 mph in less than 5 seconds. The smaller, 4.7-liter Thebar was raised yet again in horsepower. A new 330 horsepower 5.7 liter Hemi V8 option was available on the Limited giving the Grand Cherokee a best in class horsepower rating. And for 2006 a new SRT8 model of the Grand Cherokee with a (420 horsepower) 6.1 liter Hemi V8 was released to show such new muscle SUVs from Thehigh-performance SRT8 model has a 420-horsepower 6.1-liter Hemi V8 and can accelerate from 0 to 60 mph in less than 5 seconds. The 2008 Jeep Grand Cherokee comes in four trim levels. 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 currently Thehorsepower for 5.7 Hemi ranges from 340 to 395 horsepower and offers a torque of 375 to 410 ft-lb. Compatible Models. 2003-Present Ram 1500/2500/3500; 2004--Present Dodge Durango; 2005-2008 Dodge Magnum (R/T) 2006-Present Dodge Charger (R/T) 2005-Present Jeep Grand Cherokee; 2006-2010 Jeep Commander; 2007-2009 Withthis engine, the Grand Cherokee gets 19 mpg in the city and 26 mpg on the highway. This rating is slightly below the class average. A 360-horsepower 5.7-liter V8 engine is available in Limited, Trailhawk, Overland, and Summit trims. Fuel economy with this engine slips to 14 mpg in the city and 22 mpg on the highway. Thestandard engine across the entire non-hybrid 2023 Jeep Grand Cherokee lineup is the 3.6-liter Pentastar V6, which delivers 293 horsepower and 257 lb-ft of torque. The 5.7-liter Hemi offered 357 horsepower and 390 lb-ft of torque, so buyers are losing a little horsepower and a ton of torque with the move to the standard V6. 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) 62posts · Joined 2013. #5 · Nov 24, 2013. If this helps you at all the diesel GC is slower 0-60 than the V6. Don't know the 1/4 mile but it probably just gets worse for the diesel. V6 4x4: 7.7 sec. Diesel 4x4: 7.8 sec. Hemi 4x4: 6.6 sec. SRT: 4.1 sec. All trucks tested were 2014 with the 8 speed & 4x4. The2013-14 SRT Jeep Grand Cherokee includes a 6.4L Hemi motor producing 470 hp (350 kW) and 465 lb⋅ft (630 N⋅m), which was the most powerful engine ever included in a Jeep at the time of production. 6.2L Hellcat HEMI V8, 707 hp (527 kW; 717 PS) at 6,000 rpm and 645 lb⋅ft (875 N⋅m) of torque at 4,800 rpm; Requires 91-octane unleaded B8zAlE1.