We had the chance to sample the full range of 2005 Jeep Grand Cherokee engine offerings and came away impressed with all three. Even the new 210-horsepower, 3.7-liter V6 (which replaces the venerable 4.0-liter inline six on entry-level Laredo models) offered respectable performance, allowing us to pass slower traffic on winding uphill stretches of two-lane. While admittedly there were just two modest-size adults on board, we suspect this engine would be plenty powerful for the way many buyers use their SUVs.
Those who feel the need for more power will want to check out the 4.7-liter V8, which returns to the line-up this year with a number of minor improvements. An option on Laredo models and standard equipment on Limiteds, this engine delivers 235-horsepower and 305 lb.-ft. of torque while returning EPA estimated fuel mileage of 14 mpg in the city and 20 mpg on the highway.
Without question the most exciting new engine choice here is the 5.7-liter Hemi V8 we love so dearly in other Chrysler group products. With 330-horsepower and 375 lb.-ft. of torque, this monster motor provides great gobs of power on demand. The engine also features Chrysler’s Multi-Displacement System (MDS) that imperceptibly shuts down four of the engine’s eight cylinders under low load situations to help improve fuel economy and just as subtly reactivates them when you need the extra juice. With EPA fuel economy estimates of 14 mpg city and 21 mpg highway, the system helps the big V8 deliver surprisingly respectable mileage for an engine with this much oomph.
Ultimately, we think most buyers could live quite happily with any of these powerplants. But because towing capacity varies so dramatically between the three – 3,500 pounds with the 3.7-liter V6, 6,500 with the 4.7-liter V-8, 7,200 with the 5.7-liter Hemi – we suggest going with one of the V-8s if there’s likely to be significant amounts of heavy lifting in your new Jeep Grand Cherokee’s future.
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