2007 Jeep Wrangler Unlimited X Sport Utility 4-door 3.8l 6 Speed Manual 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.

2014 Jeep Cherokee: Fall colors tour [w/video]

The Trailhawk's rugged good looks were right at home against the backdrop of changing seasons. Regardless of where you choose to call home, you've probably seen, or at least heard, about the Pure Michigan ads, showing off all the splendor that the Mitten State has to offer. You can make fun of them all you want (several spoofs already exist), but as a native, I fully stand behind the idea that Michigan is a truly gorgeous place. The western coast along Lake Michigan and the northern half of the Lower Peninsula are seriously pretty, and vastly different from the southeastern area that houses big cities like Detroit, Ann Arbor, Flint, and so on. Beyond that, the Upper Peninsula is the closest you'll get to seeing vast spoils of untouched wilderness, and trust me – it's truly pretty. I've seen the world, but I still feel all warm and fuzzy every time I venture north to experience all the vistas that my own state has to offer. In the autumn months, the changing leaves in Michigan put on quite a display. Sure, this happens all over the world, but we truly embrace autumn in the Wolverine State, and practically every Detroit-based Autoblog staffer has gone on at least one fall colors tour to the northern Lower Peninsula to take it all in. That's exactly what associate multimedia producer Chris McGraw and I did just over a month ago, behind the wheel of our long-term 2014 Jeep Cherokee. The Trailhawk's rugged good looks were right at home against the backdrop of changing seasons, and we opted to capture the whole experience on video for this latest long-term update. The Tunnel of Trees is a picturesque stretch of Michigan's M-119 highway that starts just northeast of Petoskey. As you can see in the video above, the Tunnel of Trees is a picturesque stretch of Michigan's M-119 highway that starts just northeast of Petoskey and follows Lake Michigan's Little Traverse Bay. This winding road through the woods goes on for nearly 30 miles, largely unobstructed by neighborhoods, fueling stations, shops, or roadside fodder, and spits you out at the famous Legs Inn in Harbor Springs. (Top-notch Polish food, if you're hungry.) From there, you can either continue north toward Mackinac City and the Mackinac Bridge that connects Michigan's lower and upper peninsulas, or you can turn around and take in all the goodness again.

2014 Jeep Grand Cherokee EcoDiesel

Choose Your Own Adventure... But Choose Wisely
Jeep has got you covered. We can say this without even having to know what it is you want, because there's hardly an option or configuration that you won't find in the 2014 Grand Cherokee. There are three different engines, three different four-wheel-drive systems (plus rear-wheel drive), four different trim levels - not counting SRT - two different suspension setups and five different settings for various off-road terrain conditions. If you happen to check the box for Quadra-Lift, you'll also have five different ride-height settings for the driver-selectable air suspension.
As you might expect with so many customization possibilities, the way a buyer checks the options sheet can have a profound effect on the final product and its capabilities, to say nothing of its price. Nowhere is that more true than with the Grand Cherokee's choice of engines, with the brand-new 3.0-liter EcoDiesel V6 stealing the spotlight from the still excellent gasoline-fueled 3.6-liter Pentastar V6 and 5.7-liter Hemi V8 powerplants that carry over from last year. No matter which engine you choose, though, it will be paired up with Jeep's new standard eight-speed automatic transmission from ZF. This, ladies and gentlemen, is very good news indeed.