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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.

Some Jeep Cherokees and Chrysler 200s to get standard stop-start in 2015

Automakers the world over are striving to find ways to make their models more efficient, and Chrysler has a solution for some versions of the 2015 Chrysler 200 and 2015 Jeep Cherokee (2014 model shown). The Tigershark 2.4-liter four-cylinder in the 200 and the 3.2-liter Pentastar V6 in the Cherokee are getting a slight boost later this year thanks to the addition of Chrysler's Engine Stop-Start system as standard equipment. The company predicts modest gains - a three-percent improvement in fuel economy and a three percent reduction in CO2 emissions with the new tech compared to without it. While it's not much, those who sit in traffic a lot may see a difference.
Chrysler's stop/start system uses a high-speed starter motor to restart the vehicle in a claimed a third of a second. It works by detecting when the vehicle comes to a stop and turning off the engine. A more powerful battery maintains all of the model's accessories while it sits. When the driver lets off the brake, the car starts up again to drive away. There is even a button in the cabin to turn the ESS off, if desired.
The Jeep will be the first to receive ESS in the third quarter of this year to coincide with the start of production of the 2015 model-year version. The 200 will follow in the fourth quarter as a rolling change in production.

Jeep lays out 5-year plan, including rebirth of Grand Wagoneer and new C-segment offering

Fiat Chrysler CEO Sergio Machionne presented a five-year plan for the company brands this morning, with Jeep first up on a long day of presentation. Jeep's head honcho Michael Manley wasted no time in laying out what the foreseeable future will look like for what he calls the "lead global brand" of the company.
Big goals for the next half-decade will include expanding the lineup from five nameplates built in one country, to six nameplates build in six countries. That expansion of models will include both a three-row competitor, and, of course, a small vehicle to slot below Cherokee. The company is also seeking to add a whopping 1,300 dealers over the next few years, to sell all this new metal, and has an aggressive goal of doubling Jeep sales by the time 2018 rolls around.
As expected, that first salvo from the off-road brand will be the debut of the much ballyhooed Renegade small crossover in the third quarter of this year. Jeep has already designated that Renegade will get refreshed for the 2017 model year, as well.