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.
Buyers who want more power can opt for the award-winning 5.7-liter V-8, rated at 357 horsepower and 390 lb.-ft. of torque delivered over a broad power band.
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