2006 Jeep Grand Cherokee Overland Sport Utility 4-door 5.7l on 2040-cars

Auto blog

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.

Jeep Cherokee won't get diesel until sales of oil-burning Grand Cherokee improve

Okay Jeep fans, you want more diesel options? Time to step up and prove it. The only way Jeep will offer a diesel powerplant in the Cherokee, according to brand head Mike Manley, is if sales of the Grand Cherokee EcoDiesel nearly double.
Currently, about eight percent of the Grand Cherokees sold feature the 3.0-liter, EcoDiesel V6. That's simply not enough to warrant the bringing an oil-burning Cherokee to the US market, despite the vehicle's presence in Europe, where it's sold with a 2.8-liter diesel V6.
"Cherokee is slightly different because of its weight and size. When I think about bringing Cherokee diesel here, I would like to see Grand Cherokee diesel get much higher than eight percent," Manley told Automotive News. "It would have to be in mid-double digits."

Airbag fault on 1M recalled Jeeps getting second look from NHTSA [UPDATE]

UPDATE: Here is the statement we received from Chrysler regarding NHTSA's query: "Chrysler Group LLC advised the National Highway Traffic Administration of the six reports and, in accordance with the Company's long-standing practice, is cooperating fully with the resulting investigation. Customer safety is paramount at Chrysler Group. Customers who are concerned may call 1-800-853-1403."
It appears that Jeep's repairs for nearly one million Grand Cherokees from 2002-2004 and Liberty models from 2002-2003 might not be over yet. The vehicles were first recalled in November 2012 because the front airbags could suddenly deploy without being in an accident. Now, the National Highway Traffic Safety Administration is opening a recall query into them because of reports of inadvertent activation on some already corrected vehicles.
The original problem affected over 919,000 vehicles worldwide, including 744,822 in the US, and was caused by a degrading circuit in the wires that control the airbags. In some cases the airbag warning light would come on just before the premature activation, but in other cases it would just happen. The automaker installed an "in-line jumper harness with an integrated electrical filter" meant to eliminate the power spikes believed to be the cause.