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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.

The List: Best of proving grounds

Proving grounds are where automakers and enthusiasts alike go to push their vehicles to their mechanical limits. The Rubicon Trail, located in the Sierra Nevada, is the ultimate off-road test, while Germany's Nurburgring is a grueling 13 mile road and track course. Jessi and Patrick visit both iconic proving grounds in this "best of" compilation of The List. If you like what you see, stay tuned to watch the full episodes, or click here to go directly to our episode archive and pick out some of your own favorite moments of The List to revisit. The List #0004: Conquer the Rubicon Trail The List #0073: Drive the Nurburgring Have an RSS feed? Click here to add The List. Click here to subscribe to The List in iTunes. Click here to learn more about our hosts, Jessi and Patrick. BMW Jeep Off-Road Vehicles Racing Vehicles The List Videos Original Video

2020 Land Rover Defender vs. 2020 Jeep Wrangler: How they compare on paper

For ages, the Jeep Wrangler has had the serious off-road SUV market in America all to itself, especially when it comes to two-door variants. But competition is coming, and the first on its way is the 2020 Land Rover Defender, which was just revealed at the Frankfurt Motor Show. Each packages retro looks and impressive off-road capability, but does one have an advantage? We decided to take a look into each SUV's specifications and compare them on their engines, drivetrains, interior space and towing among other things, to see how they stack up. Since both SUVs are offered in two-door and four-door versions, we've made sure to feature both versions. You can find all the vital stats in the chart below, followed by more in-depth analysis. Engines and drivetrains The Land Rover is the clear high-performance option of these two SUVs. Its base turbocharged 2.0-liter four-cylinder, offered only in the four-door Defender 110, is more powerful than either of the gas engines offered on the Jeep Wrangler. The Wrangler's four-cylinder matches it on torque, at least. The optional turbocharged 3.0-liter inline-six in the Defender makes over 100 more horsepower and pound-feet of torque than either Jeep gas engine. But if you're looking for diesel propulsion, along with its associated torque and fuel economy, the Wrangler will be your only option. Final specs haven't been released, but in the Ram 1500, the same engine makes 260 horsepower and 480 pound-feet of torque. Fuel economy hasn't been announced for the Land Rover or the diesel Wrangler. But if fuel economy is a concern, the four-cylinder Wrangler is the most frugal of the SUVs we have numbers on. As for transmissions, the Wrangler is your only choice if you have to have a manual. It's available on both the two-door and four-door models, but only with the V6 engine. If you don't mind an automatic transmission, both SUVs come with variations on the ZF eight-speed auto. Getting the power to the wheels is another area where these two SUVs diverge. The Jeep is very traditional with a standard selectable four-wheel-drive system with two-wheel drive, and low- and high-range four-wheel drive modes. On the Sahara, there's an available full-time four-wheel drive mode, but the other modes are still available. On the Land Rover, you get full-time four-wheel drive, the same kind used on the Land Rover Range Rover.