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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.

Feds fretting over remote hack of Jeep Cherokee

A cyber-security gap that allowed for the remote hacking of a Jeep Cherokee has federal officials concerned. An associate administrator with the National Highway Traffic Safety Administration said Thursday that news of the breach conducted by researchers Chris Valasek and Charlie Miller had "floated around the entire federal government." "The Homeland Security folks sent out broadcasts that, 'Here's an issue that needs to be addressed,'" said Nathaniel Beuse, an associate administrator with the National Highway Traffic Safety Administration. Valasek and Miller commandeered remote control of the Cherokee through a security flaw in the cellular connection to the car's Uconnect infotainment system. From his Pittsburgh home, Valasek manipulated critical safety inputs, such as transmission function, on Miller's Jeep as he drove along a highway near St. Louis, MO. The scope of the remote breach is believed to be the first of its kind. The prominent cyber-security researchers needed no prior access to the vehicle to perform the hack, and the scope of the remote breach is believed to be the first of its kind. A NHTSA spokesperson said the agency's cyber-security staff members are "putting their expertise to work assessing this threat and the response, and we will take action if we determine it's necessary to protect safety." A Homeland Security spokesperson referred questions about the hack to Chrysler. Fiat Chrysler Automobiles has already been the subject of a federal hearing this month, in which officials scrutinized whether the company had adequately fixed recalled vehicles and repeatedly failed to notify the government about defects. But cyber-security concerns are a new and different species for the regulatory agency. Only hours before the Jeep hack was announced by Wired magazine earlier this week, NHTSA administrator Dr. Mark Rosekind said hacking vulnerabilities were a threat to privacy, safety, and the public's trust with new connected and autonomous technologies that allow vehicles to communicate. NHTSA outlined its response to the cyber-security challenges facing the industry in a report issued Tuesday. In it, the agency summarized its best practices for thwarting attacks and said it will analyze possible real-time infiltration responses. But the agency's ability to handle hackers may only go so far.

2014 Jeep Compass/Patriot sing their swan songs with a six-speed automatic

Unless the governor, Fiat CEO Sergio Marchionne, gives them a reprieve, the 2014 Jeep Compass and Patriot are expected to meet their makers sometime next year. Should they perish, it's a shame that it would happen just as they've shed the continuously variable transmission that was their major bugbear, and just as the Compass has gotten its best looks yet.
Both will roll with a proper six-speed automatic transmission, courtesy of PowerTech. Noise-resistant gears and tuning by Chrysler boffins should alleviate the unappealing sounds that were given off by the older CVT. Unless, that is, you choose to have either model equipped with Freedom Drive II; the serious off-road package, available on both baby Jeeps, will still come with the CVT. The base transmission on the entry-level Sport trim remains the five-speed manual.
Otherwise, it's minor changes for the Compass, set off by the new 18-inch wheel option, trim pieces around the car and a back-up camera. The Patriot gets seat-mounted airbags, but is carryover otherwise. With their expected demises perhaps a year away, not much has changed otherwise. Engine choices comprise the 2.0-liter four-cylinder with 158 horsepower and 141 pound-feet of torque or the 2.4-liter four-cylinder with 172 hp and 165 lb-ft.