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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 idles second shift it hired a month ago for 2014 Cherokee

In an unusual move, Chrysler is idling its recently hired second shift of 2014 Jeep Cherokee builders because, Chrysler spokeswoman Jodi Tinson said in a statement, it already has built the "critical number of vehicles we need to stock dealerships once containment is released," Automotive News reports.
After the "critical" 9,430 Cherokees were built, the layoff was enacted so as not to strain the automaker's logistics partners before the Cherokee is actually released. Chrysler says the temporary layoff will last about two weeks, with 500 workers out of work and another 600 reassigned at the Toledo Assembly Complex where the sports utility vehicle was being built. The second-shift workers were hired on August 19.
Chrysler previously insisted that it would release the Cherokee to dealerships by the end of the third quarter, and it initially planned to start selling the SUVs in mid-August. Apparently the Cherokee needed a software fix before hitting showrooms, which is how Chrysler explains why the release schedule is out of whack. We're thinking that this software fix addresses the "powertrain calibration" issue that delayed the first media test drives of the model. According to the Toledo Blade, Chrysler has admitted it is doing "extended quality validation testing" but refused to provide more information.

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.