2000 Jeep Grand Cherokee Laredo Sport Utility 4-door 4.0l on 2040-cars

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FCA inline-six rumored to be real, headed for Jeep Wagoneer

In September, Allpar reported that that clues being dropped at Fiat- Chrysler headquarters, in the carmaker's factories, and on engineer resumes pointed to the development of an inline six-cylinder engine. The site has just proclaimed the rumor is reality, writing that the straight-six, "turbocharged to meet or beat 5.7 Hemi power ratings, with a smoother torque curve, is on the way." The motor's first outing is expected to be either the next-generation Jeep Grand Cherokee, debuting perhaps next year, or the Jeep Wagoneer, debuting in 2020 or 2021. "Tornado" is the purported codename for the power plant said to be just under three liters in displacement, expanding the family begun with the Global Medium Engine 2.0-liter turbo codenamed Hurricane. Engine bay constraints and a long use horizon mean engineers won't simply add two more cylinders to the GME, however. Allpar says the brief is to keep the Tornado GME-T6 — the alphanumeric for "turbocharged six" — no more than three inches longer than the Tigershark 2.4-liter four-cylinder. That means "major design changes" that could include a space-saving head, more closely spaced cylinders, and no cylinder liners. An FCA division called Comau could be called on for its "SmartSpray" plasma lining technology. Allpar muses that the standard version of the engine for Chrysler, Dodge, Jeep, and Ram could get a single twin-scroll turbocharger. Performance trims for Alfa Romeo and Maserati could get different heads and maybe twin turbos, an SRT version might also get both those tweaks. History shows that the Italian versions would make changes to the block, as well. Even so, the Tornado would be less expensive than any Ferrari-supplied V6. A straight-six would put FCA in company with current adopters BMW and Mercedes-Benz, future users like Jaguar, and perhaps Aston Martin. The engine would span the widest range of use cases in the U.S. carmaker's portfolio, though. Potential applications include being a base engine for Ram trucks, serving double duty as a base engine and 5.7-liter Hemi replacement for the Dodge Charger and Challenger, working in the high-end Jeeps, and as a properly hot trim — with Ferrari-designed heads — in the luxury Italian sports cars. The Alfa Romeo Giulia begs for just such motivation to fill the gap between the 280-hp, $42,695 Ti Sport RWD and the 505-hp, $73,700 Giulia Quadrifoglio RWD. And a twin-turbo inline-six in a Maserati Alfieri would stack up nicely with the Germans.

We test the latest Easter Jeep Safari off roaders in Moab

The Easter Jeep Safari began as a play for tourism: in 1967 the Moab Chamber of Commerce invited "the Jeeping community" to ride a single trail on the Saturday before Easter. The attendees were mostly members and friends of the Chamber of Commerce. Now, 52 years later, the nine-day Safari takes place on more than 40 trails and lures thousands of Jeepers, who put on one of the biggest and best modified Jeep shows in the world. Cue the designers at Jeep and Mopar, who mastermind new ideas every year for what a modified Jeep could look like, with inspiration from the experiences they have and the mods they see at the Safari. We flew to Moab to drive the seven newest concepts, and start the recap with the disappointments: The B-Ute and the 4-Speed, but only because we couldn't drive them. Before the day had properly begun, those two designer treats had tapped out. The Renegade – internally codenamed B Utility, hence the "B-Ute" name – always feels like The Little Engine that Could when placed next to its halo Wrangler brother. In addition to the cosmetic changes, designers put the arcane caption "Lt. Jenkins" above "FWD1337" (explanations of those two memes here and here). The B-Ute would have been nice to drive if for no other reason than shouting "Leeeroy Jenkins" all around the course. View 16 Photos We rued missing out on the 4-Speed. The blue wonder is the third of a conceptual trio called "The Lightweights," focused on nimble trail handling provided by weight savings. The first of the Lightweights, the 2011 Pork Chop concept, cut 900 pounds from a standard Wrangler Sport. The 2013 Stitch concept lopped 1,100 pounds. The 4 Speed omits 900 pounds. Jeep brought both earlier concepts, and they were revelations. The Stitch was a throwback to stripped-out Dukes-of-Hazard-style Jeep romping. Round vents at the edges of the instrument panel act as side mirrors, Fiat Abarth seats grip occupants, the lemon-hued bikini top sewn from a transparent welding curtain bathes the cockpit in yellow light. Daisy Duke drove a 1980 CJ-7 that had 87 horsepower to move 2,700 pounds. The Stitch weighs about 3,200 pounds, but gets 290 hp. The Stitch skimmed over rocks and floated over sand, so light on its feet that Jeep lead designer Mark Allen told us the 35-inch Mickey Thompson MTZ tires were inflated to a mere 3 psi. The 4-Speed concept's pretty close to the Stitch weight thanks to carbon bits and lighter four-cylinder engine.

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.