2021 Jeep Grand Cherokee Limited 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.

In Michigan, car hackers could face life imprisonment

Car hackers may not want to mess with vehicles in and around the Motor City. A pair of Michigan lawmakers introduced legislation Thursday that would punish anyone who infiltrates a vehicle's electronic systems with penalties as harsh as life imprisonment. Senate bill 927 says that "a person shall not intentionally access or cause access to be made to an electronic system of a motor vehicle to willfully destroy, damage, impair, alter or gain unauthorized control of the motor vehicle." Offenders will be deemed guilty of a felony, and may be imprisoned for any number of years up to life in prison. The proposed legislation is one of the first attempts nationally to address the consequences for car hacking, which has become a top concern throughout the auto industry. Critics have accused executives of being slow to respond to the threats, which were first known as long as six years ago but gained attention last July when a pair of researchers remotely controlled a Jeep Cherokee. In January, the industry established an Information Sharing and Analysis Center to collectively evaluate security measures and counter breaches. But the Michigan bill isn't noteworthy only because of the life penalty prescribed; it's noteworthy for what's missing in its details. Language in the bill doesn't delineate between independent cyber-security researchers and criminals who intend to inflict harm or havoc. Under its provisions, it's possible Charlie Miller, pictured below, and Chris Valasek, the researchers who demonstrated last summer that the Cherokee could be remotely commandeered and controlled, could face life behind bars. Provisions of the legislation that prevent a person from "altering" the motor vehicle could ensnare car enthusiasts or gearheads who tinker with electronic systems to boost performance, increase fuel efficiency or add aftermarket features. In that context, Senate Bill 927 seems like the latest measure in a running feud between independent researchers, gearheads and big automakers. Car companies don't like third parties poking around their electronic systems and would prefer the researchers not reveal security weaknesses. Researchers, on the other hand, say many carmakers are either slow to fix or unwilling to repair security holes unless they're able to publish their findings.

eBay Find of the Day: Jeep Comanche Zombie Response Unit

We've seen some pretty fantastic apocalypse vehicles in our day. We've even owned one or two, but this particular Jeep Comanche tugs at our heart strings in all the right ways. Let's start with the basics: there's a stout 4.0-liter engine underhood hooked to a five-speed manual transmission, and while we wish this truck was four-wheel drive, the two-inch lift and oversize tires should help you overcome obstacles with enough momentum.
Details like handy shovels, Jerry cans and a brush guard inspired by the hardware on a CUCV help lend the truck a no-nonsense appeal, and the functional CB whip antenna means you can ask for backup when the undead hordes come your way. If you like what you see as much as we do, you can head over to eBay Motors to place a bid. The auction has inched up to $4,000 with just two days left on the clock.