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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.

Woman and child die after Jeep gets stuck in mud

A Florida woman and her baby died over the weekend when their Jeep sank into deep mud during an off-roading trip. Taylor Brown took his girlfriend Hallie Lewis and their infant son Bryson off-roading in his Jeep Cherokee on Saturday night. The Jeep became stuck in thick mud, according to WESH. Brown got out of the vehicle while Lewis and Bryson remained inside. Using a winch, Brown tried – unsuccessfully – to free the Jeep. The Cherokee was left running as he struggled to pull it out of the mud. When he returned to the Jeep to check on his son and girlfriend, he found them unresponsive. Taylor pulled the two out of the back window, but it was too late. Lewis was pronounced dead at a nearby hospital. The baby died shortly thereafter. Police are still investigating, but their deaths appear to be a tragic accident due to carbon monoxide poisoning. The tailpipe of the Jeep was either submerged or caked with mud, allowing the deadly gas to build up inside the vehicle. News Source: WESH Weird Car News Jeep tailpipe carbon monoxide

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.