2024 Jeep Grand Cherokee Limited on 2040-cars

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Chrysler axes old V6s, goes all-Pentastar

Old technology has a way of lingering on, particularly at Chrysler headquarters in Auburn Hills. So while the Pentastar V6 has replaced the older engine architecture in just about every application, it still soldiered on in some export markets. But the introduction of a new 3.0-liter Pentastar V6, produced in Michigan and meant only for the Chinese market, has put the final nail in the old engine's coffin.
Fitted into the 2014 Jeep Grand Cherokee and Jeep Wrangler just introduced to China at the Chengdu Motor Show, the downsized six uses the same architecture as the larger 3.6-liter Pentastar V6. But because of its 2,997cc capacity, it can be exported to China without the increased duty the 3.6-liter or even 3.2-liter Pentastar engines would incur. The 3.0-liter V6 develops 230 horsepower at 6,350 rpm and 210 pound-feet at 4,400 rpm.
Admittedly, it's unlikely, but even though the engine was said to be created solely to undercut tax thresholds in China and Europe, the 3.0-liter Pentastar has recently surfaced in rumors of an application here: as the boosted heart of a potential Cherokee SRT with anywhere from 375 to 410 hp.

Crawling Moab in the 2015 Jeep Renegade Trailhawk [w/video]

The funny thing about the Renegade Trailhawk is that Jeep still feels the need to defend it. For the past 20 years, automakers have sent emissary vehicles outside the citadel walls surrounding their brand niche. In doing so, these companies found buyers eager to join the cult instead of an angry horde. With the kingdom successfully expanded, automakers had to build new walls to contain this broader identity. This is the story of Jeep's modern expansion, growing with new models while the faithful at the brand's center howl at every quest into broader market segments. Thirteen years after it busted out the Liberty and eight years after birthing the Compass and Patriot, you'd think the resistance to new Jeeps would subside. But no. It's 2015, and while nobody makes the slightest tantrum over BMW's new minivan (except for Sniff Petrol), the Renegade still has to fight its way through pitchforks and torches. Which is a long way of saying that this author is guilty of brand prejudice, too. When the company told us that we'd spend the first day of the Easter Jeep Safari driving seven awesome concepts and the second day driving the Renegade Trailhawk on Dome Point Trail, we could only think, "They giveth excitement, and they taketh it away." Our pessimism was later proven to be incorrect. Sharing the sentiment our colleague Brandon Turkus expressed after his Quick Spin, we found the Renegade to be "in a word, impressive." Dome Point will not trouble a kitted-out Wrangler, but in a compact SUV with on-road tires the rocky sections were chunky enough to require close attention to your lines or use a spotter. As instructed, we put the little 4x4 into the Selec-Terrain's Rock mode, and with common sense plus one eye on the man directing us with hand signals the Renegade climbed over everything with some wheelspin but little fuss. At the first rest point, we turned the car off to wait for vehicles behind. Not realizing that this resets the drive mode to Auto, we crawled through the next two rocky jumbles in the default setting. The result was the same: a bit of wheelspin climbing over thick steps, but an altogether drama-free passage. Auto mode can't use the engine throttle maps unique to each Selec-Terrain setting, but it doesn't hamper the Renegade's capability by much. On a steep bit of trail with a crest capped by stacked stone plinths, it took three tries to find the right line, but that's on us – the Renegade did more than expected.

500+ hp Stellantis 'Hurricane' I6 previews a world without Hemis

After years of rumored development, Stellantis has revealed its new six-cylinder engine family. The 3.0-liter, twin-turbocharged "Hurricane" I6 will offer V8 power, forced induction torque and six-cylinder efficiency in a package designed to fit into any of the company's North American rear-wheel-drive platforms.  What is "V8 power," exactly? Well, in standard output guise, the new I6 cranks out more than 400 horsepower (the specific figure will vary by application) and 450 pound-feet of torque, while the high-output variant is good for more than 500 horses and 475 lb-ft. The final figures will be dependent on the application. We'll save you a little legwork: In current Ram, Jeep and Dodge products, the 5.7-liter Hemi tops out at about 395 hp and 410 lb-ft, give or take, and the 6.4-liter around 485 hp and 475 lb-ft.    This is a clean-sheet design that is only related to the company's turbocharged four-cylinder by some common measurements. The I6 is exclusively direct-injection (no hybrid/port-injection here) and the two I6 variants share 96 common parts, including the block and oil pan design. The differences are found in their internals, intake plumbing, valvetrain components and the turbochargers themselves. Stellantis is not yet ready to share specs or supplier info for the turbos but says announcements will come from its partners soon.  The standard-output I6 has a compression ratio of 10.4:1 and revs to 5,800 rpm. It will run on regular fuel, albeit with reduced performance; 91 octane is recommended for maximum output. The high-output variant has a compression ratio of 9.4:1 and will rev to 6,100 rpm. That one will require premium. The new I6's advantages go beyond basic power output. Every Hemi family engine currently in production is based on an iron block design, so they're heavy. The aluminum-block I6 shaves weight off the total engine package, even if some of that gets added back thanks to the turbos and their associated plumbing. The standard-output I6 weighs 430 pounds, Stellantis engineers told us; the high-output adds just another 11. Fully dressed 5.7-liter V8s are in the 550-560-pound ballpark, and 6.4-liters close in on 600 pounds.  You may be wondering, "Why a clean-sheet gasoline engine now, when the industry is moving toward battery-electrics?" A valid inquiry, and one Stellantis was prepared to address. While the company will be pivoting to electrification over the next decade, it won't be instantaneous.