Standard is the all-aluminum 3.6-liter Pentastar V-6 engine, rated at 290 horsepower and 257 lb.-ft. of torque. Lauded for its power and refinement, the 60-degree angle between the Pentastar V-6’s cylinder banks makes it inherently smooth running, augmented by accessories that bolt directly to the engine block. A seven-time winner of the Wards 10 Best Engines and Propulsion Systems award, the Pentastar V-6 engine is compact, with features such as exhaust manifolds integrated into the cylinder heads.
Chain-driven dual overhead camshafts include two-step variable valve lift and variable-valve timing (VVT). This combination quickly tailors engine output to the demands of the driver for the best balance of performance and fuel economy.
Fuel-saving engine stop-start (ESS) technology is standard on the Pentastar V-6. The ESS system has been upgraded and refined for the Grand Cherokee L. Changes include a pressure reserve element in the eight-speed transmission, which provides dedicated transmission fluid to the shift elements at engine restart for a quick launch. Refined powertrain controls and new starter technology minimize early engine restarts from minor movements of the driver’s foot on the brake pedal. Restart noise, vibration, and harshness have been reduced via revised controls and switchable engine mounts.
The 3.6-liter Pentastar V-6 engine is rated for a towing capacity of up to 6,200 pounds and an estimated class-leading driving range of nearly 500 miles.
VVT with dual-independent cam phasing enables better fuel efficiency across a wide torque band in the Pentastar V-6. Nearly 90 percent of the engine’s peak torque is available from 1,800 to 6,400 rpm – an important consideration when towing or hauling.