2006 Jeep Wrangler Se on 2040-cars

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FCA's Pentastar V6 gets more power, efficiency for 2016

Already a vital member of FCA's powertrain lineup, the 3.6-liter Pentastar V6 is receiving major efficiency improvements for 2016. Thanks to a massive amount of new tech attached to the mill, fuel economy is up six percent, and torque below 3,000 rpm jumps nearly 15 percent. The updates arrive first in the 2016 Jeep Grand Cherokee, but they should proliferate to other models eventually. At least in the Grand Cherokee, the tweaks push power up five horsepower to 295 ponies. FCA's engineers went through the Pentastar from top to bottom to eke out as much efficiency as possible. For example, there's now a two-speed variable-valve lift system that can run in low- or high-lift modes. This upgrade is responsible for 2.7-percent better economy, the company claims. A new intake manifold with longer runners and updated variable-valve times also helps boost the torque output. Further improvements come from pushing the compression ratio to 11.3:1, from 10.2:1 before. Perhaps most impressive is that despite all of the innovations, the latest Pentastar actually weighs four pounds less than the current version. Beyond the Pentastar improvements, all of the FCA US gasoline engines, except for the Viper's 8.4-liter V10, will be E15-compatible for 2016. The company says that it wants to be ready for the higher ethanol content fuel's greater use in the near future.

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.

2014 Jeep Compass/Patriot sing their swan songs with a six-speed automatic

Unless the governor, Fiat CEO Sergio Marchionne, gives them a reprieve, the 2014 Jeep Compass and Patriot are expected to meet their makers sometime next year. Should they perish, it's a shame that it would happen just as they've shed the continuously variable transmission that was their major bugbear, and just as the Compass has gotten its best looks yet.
Both will roll with a proper six-speed automatic transmission, courtesy of PowerTech. Noise-resistant gears and tuning by Chrysler boffins should alleviate the unappealing sounds that were given off by the older CVT. Unless, that is, you choose to have either model equipped with Freedom Drive II; the serious off-road package, available on both baby Jeeps, will still come with the CVT. The base transmission on the entry-level Sport trim remains the five-speed manual.
Otherwise, it's minor changes for the Compass, set off by the new 18-inch wheel option, trim pieces around the car and a back-up camera. The Patriot gets seat-mounted airbags, but is carryover otherwise. With their expected demises perhaps a year away, not much has changed otherwise. Engine choices comprise the 2.0-liter four-cylinder with 158 horsepower and 141 pound-feet of torque or the 2.4-liter four-cylinder with 172 hp and 165 lb-ft.