2004 Jeep Wrangler 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.

Jeep reveals Grand Cherokee SRT Night, Wrangler Backcountry

Another major car show is almost upon us, and you know what that means. That's right, boys and girls – another pair of custom Jeeps. Far be it from us to complain, though, especially when the pair of SUVs debuting at the LA Auto Show this month aren't just for show. These will actually be offered to the public as new special editions. In one corner we have the Jeep Grand Cherokee SRT Night edition, with all the brightwork replaced with black. The roof, rear spoiler, front grille bezels, pillars, and window surrounds are all done up in gloss black, while the wheels – custom 20-inch jobs – as well as the front applique and badging have all been given a satin black treatment. The interior, as you might have guessed, is also predominantly black, with black leather, black chrome bezels, and silver stitching. Buyers will be able to choose between deep red, silver, or dark gray exterior colors, but either way they'll be getting the same 6.4-liter V8 – all 475 horsepower and 470 pound-feet of it. In the other corner is the Jeep Wrangler Backcountry. This one's based on the Wrangler Sahara and features a special off-road front bumper, powder-coated rear bumper, and the 17-inch wheels and rock rails from the Wrangler Rubicon. The interior features piano-black trim, leather and mesh seats, vinyl accents, nine-speaker Alpine sound system, and more. It'll be available in five colors – blue, black, white, gray or purple – with special graphics (because nothing says "backcountry" quite like neon pink decals on a purple Jeep) and a standard black (or optional body-colored) hardtop. The Wrangler Backcountry will be reaching dealers around the same time as its live debut towards the end of this month. Don't expect to see the GC Night edition on the streets until early next year, though. Pricing for either has yet to be announced, but you can scope out the details of both in the press release below. Jeep® Introduces Two New Special-edition Models at the Los Angeles Auto Show - New 2016 Jeep® Grand Cherokee SRT Night boasts stealth-like premium black appearance, with black roof and lightweight performance wheels - New 2016 Wrangler Backcountry delivers enthusiasts a unique Jeep SUV loaded with off-road capability features to tackle the toughest winter months November 12, 2015 , Auburn Hills, Mich.

EPA suspected Fiat Chrysler of using 'defeat device' in 2015

U.S. regulators told Fiat Chrysler Automobiles in November 2015 that they suspected some of the automaker's vehicles were equipped with secret software allowing them to violate emission control standards, according to emails disclosed on Friday. The U.S. Environmental Protection Agency and California Air Resources Board accused Fiat Chrysler in January of using the software, known as a "defeat device," to illegally allow excess diesel emissions in 104,000 Jeep Grand Cherokees and Dodge Ram 1500 trucks built between 2014 and 2016. Byron Bunker, director of the EPA's Transportation and Air Quality compliance division, said in a January 2016 email to Fiat Chrysler, obtained by Reuters under the Freedom of Information Act, that he was "very concerned about the unacceptably slow pace" of the automaker's efforts to explain high nitrogen oxide emissions from some of its vehicles. Nitrogen oxide is linked to smog formation and respiratory problems. Bunker's email said the EPA had told Fiat Chrysler officials at a November 2015 meeting that at least one auxiliary emissions control device on the car maker's vehicles appeared to violate the agency's regulations. Mike Dahl, head of vehicle safety and regulatory compliance for Fiat Chrysler's U.S. unit, responded in a separate email that the company was working diligently and understood the EPA's concerns. He added that if the EPA identified Fiat Chrysler vehicles as containing defeat devices it would result in "potentially significant regulatory and commercial consequences." The documents redacted the vehicles named, but two officials briefed on the matter said they referred to diesel models. The EPA's November 2015 meeting with Fiat Chrysler came two months after Volkswagen AG, mired in a major tailpipe emissions scandal, admitted to installing secret defeat device software in hundreds of thousands of U.S. diesel cars to make them appear cleaner than they were on the road.