2011 Jeep Wrangler Unltd Sahara Hard Top 4x4 6-spd 55k Texas Direct Auto on 2040-cars

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Watch this 650-hp Hennessey Jeep Grand Cherokee go from 0-60 in 3.9 seconds

Hennessey Performance Engineering has created an HPE650 package for the Jeep Grand Cherokee SRT fitted with the 6.4-liter Hemi engine. When it leaves the showroom floor it has 470 horsepower and gets from 0-60 miles per hour in 4.8 seconds. When it leaves Hennessey's garage floor after the upgrade it has 650 horsepower - 530 hp at the wheels, according to Hennessey - and gets to 60 mph in 3.9 seconds on its way to running the quarter-mile in 12.6 seconds.
There's more than just a Roots-type supercharger bolt-on, with ported cylinder heads and high-flow headers among the many changes made to the engine. You can watch this pre-2014 facelift silver model prove its spec sheet on the drag strip in the video below.

2014 Jeep Cherokee: June 2014

I got a text message from Editor-In-Chief Sharon Carty one afternoon proclaiming that her new favorite SUV is our long-term 2014 Jeep Cherokee. And she's not alone. I'm not sure if anyone else on staff would go so far as to use the "favorite" descriptor, but after just over a month of honeymooning with our new long-termer, it's safe to say that the Jeep is quickly finding its way into the good graces of a number of Autoblog staffers.
There's good reason for all that praise, too. Thus far, the Jeep has proven itself to be incredibly competent and comfortable for daily life - it's functional, quiet, and packed with a host of amenities that make it easy to live with. It's been wholly trouble-free (with less than 4,000 miles on the clock as of this writing, it ought to be), but even nitpicks have been few and far between.

NHTSA upgrading Jeep Grand Cherokee, Dodge Durango headliner fire probe

The National Highway Traffic Safety Administration investigation into headliner fires experienced by a small number of Jeep Grand Cherokee and Dodge Durango owners has been upgraded to an engineering analysis, the step before the initiation of a recall. In August last year the investigation began with 146,000 Grand Cherokees from 2012 after three complaints were received, but a report on Edmunds says it has been expanded to include 593,299 vehicles covering the 2011-2013 model years for the Jeep and the Dodge Durango, which uses the same headliner assembly, because of possibly 52 incidents of fire.
In some of those incidents drivers have reported a burning odor, smoke or open flames that were contained to the headliner or migrated to another area of the passenger compartment. The culprit has apparently been found: NHTSA blaming an electrical short in the sun visor vanity light wiring, which is routed under the headliner and held in place by three screws. Chrysler began its own probe into the issue when it was first reported and is still looking into the situation while, "fully supporting the National Highway Traffic Safety Administration's investigation."