1998 Jeep Cherokee Sport Sport Utility 4-door 4.0l 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.

Submit your questions for Autoblog Podcast #336 LIVE!

We're set to record Autoblog Podcast #336 tonight, and you can drop us your questions and comments via our Q&A module below. Subscribe to the Autoblog Podcast in iTunes if you haven't already done so, and if you want to take it all in live, tune in to our UStream (audio only) channel at 10:00 PM Eastern tonight.
Discussion Topics for Autoblog Podcast Episode #336
Jeep rear-mounted fuel tank controversy

Jeep Grand Cherokee, BMW i8, Ford F-150 win 2015 Green Car Awards in DC [w/video]

There were three shiny trophies handed out at the Washington Auto Show last week by Green Car Journal, and they went to three different examples of what "green" means in the automotive industry today. The Jeep Grand Cherokee EcoDiesel won the award for the 2015 Green SUV of the Year, the BMW i8 was named the 2015 Luxury Green Car of the Year and the Ford F-150 took the 2015 Green Car Technology Award honor. There is a case to be made that the aluminum body of the new Ford truck will make a bigger impact in the overall fuel usage in the US than almost any other vehicle, given the numbers of F-150s that Ford sells each year. The B20 biodiesel-capable Jeep gets up to 30 miles per gallon on the highway. And the i8 puts all sorts of new, fuel-saving technologies into an attractive package. Looking over the winners, and the list of finalists you can see in our photo gallery, and you can see that the definition of green is expanding every year. You can watch Green Car Journal editor Ron Cogan hand out the 2015 awards in the video below and we'll for sure be paying attention to what wins next year. 2015 Luxury Green Car of the Year, Green SUV of the Year and Green Car Technology Winners Announced WASHINGTON, Jan. 22, 2015 /PRNewswire/ -- Green Car Journal has named the Jeep Grand Cherokee EcoDiesel its 2015 Green SUV of the Year™ and the BMW i8 its 2015 Luxury Green Car of the Year™, with the aluminum-bodied Ford F-150 earning the magazine's 2015 Green Car Technology Award™. Winners were determined by a jury of Green Car Journal editors and automotive experts. The prestigious awards were announced in Washington, D.C. today at a Green Car Awards™ press conference held during the Washington Auto Show's Public Policy Day at the Washington Convention Center. "These are truly commendable vehicles representing the 'best-of-the-best' in so many ways," said Ron Cogan, editor and publisher of the Green Car Journal and CarsOfChange.com. "The auto industry's very early focus on small cars and efficiency-for-environment tradeoffs has evolved to now include a more dynamic field of 'greener' models in all vehicle classes. Those wanting greater efficiency or better environmental performance are no longer constrained by limited choices or vehicle types that fall outside their top purchase preferences.