Jeep Calls New Jeep Wrangler Rubicon 392 Most Capable Wrangler Yet

The Jeep brand of Fiat Chrysler Automobiles in Auburn Hills today introduced the V-8-powered 2021 Jeep Wrangler Rubicon 392, which the automaker calls “the most capable, quickest, most powerful Wrangler” yet.
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2021 Jeep Wrangler Rubicon 392
Jeep today introduced the V-8-powered 2021 Jeep Wrangler Rubicon 392. // Photo courtesy of Jeep

The Jeep brand of Fiat Chrysler Automobiles in Auburn Hills today introduced the V-8-powered 2021 Jeep Wrangler Rubicon 392, which the automaker calls “the most capable, quickest, most powerful Wrangler” yet.

The new Wrangler, which goes on sale in the first quarter of 2021, is equipped with the 6.4-liter V-8, rated at 470 horsepower and 470 lb.-ft. of torque. It is mated to the TorqueFlite eight-speed automatic transmission and Selec-Trac full-time active transfer case, giving the Wrangler Rubicon 392 a 0-60 m.p.h. time of 4.5 seconds and a quarter-mile time of 13 seconds. The combination comes with a factory-backed warranty.

Away from the pavement, the trail-rated Wrangler Rubicon 392’s powertrain meshes with heavy-duty wide track Dana 44 axles, a 3.73 final drive ratio, transmission torque converter lockup control, a 2-inch lift and standard 33-inch tires on 17-inch beadlock-capable wheels.

The result, according to Jeep, is the most capable Wrangler ever with 10.3 inches of ground clearance; improved suspension articulation and maneuverability; approach, breakover and departure angles of 44.5, 22.6 and 37.5 degrees, respectively; and the ability to traverse up to 32.5 inches of water.

“This is the most powerful, quickest, most capable Jeep Wrangler we’ve ever built,” says Jim Morrison, head of the Jeep brand at FCA North America. “The factory lift and abundant low-end torque from the V-8 makes the Rubicon 392 the king of the hills, whether you’re rock crawling at low speeds or powering up an incline. And, when pavement replaces dirt, Rubicon 392 makes quick work of the road.”

The addition of the 6.4-liter, 392-cubic-inch powerplant marks the first time in nearly 40 years that a V-8 has been a factory option for the Wrangler. It is specifically for the Jeep Wrangler Rubicon 392 and its functional hood scoop.

Critical to on- and off-road performance, nearly 75 percent of the Wrangler Rubicon 392’s peak torque is available just above engine idle speed, enabling a 4.5-second 0-60 m.p.h. time and crawling up steep grades.

The performance of the engine comes from its cast iron cylinder block and aluminum heads, accented with an active intake manifold, variable camshaft timing, twin spark plugs per cylinder, sodium-filled exhaust valves, hollow-stem intake valves, and piston oil cooling jets.

Fuel Saver Technology with cylinder deactivation shifts to smooth, high-fuel-economy four-cylinder mode when engine loads are light, such as cruising on the highway. A tank-mounted high-performance pump keeps the V-8 fueled under even the most demanding conditions.

An active dual-mode exhaust system is standard and engages automatically, opening valves in the exhaust system, under higher engine loads to reduce exhaust back pressure. The driver can also activate the system with the press of a button. The dual-pipe performance exhaust system is finished off with quad exhaust tailpipes.

The fully electronic, eight-speed automatic transmission features on-the-fly shift-map changing. The transmission software relies on several input parameters to determine the appropriate driving conditions and adjusts shift pattern in response. The result is automatic shifting ideally attuned to the performance requirements of almost any driving demand.

The transmission’s gear ratios afford the right response at the right time, from crawling over obstructions on the trail to smooth power delivery at highway speeds, a product of smaller ratio steps between the gears.

The heart of the driveline is a Selec-Trac full-time, active transfer case with a 2.72 low-range gear ratio. The transfer case has four driver-selectable modes: 4WD Auto, 4WD High, Neutral and 4WD Low. This full-time, two-speed transfer case is intuitive and allows the driver to set it and forget it, while constantly sending power to the front and rear wheels. The Selec-Trac transfer case also allows for Wrangler Rubicon 392 to be flat-towed.

Off road, the Wrangler Rubicon 392 delivers the capability for which Jeep is known, including:

  • Off-road Plus with Sand and Rock modes: The push of a button maximizes the Jeep Wrangler Rubicon 392’s tractive capabilities. The modes adjust throttle, transmission shift points and traction control for peak performance on higher speed passes on sand terrain, as well as during low-speed rock crawling. The Off-road Plus drive mode also gives drivers the ability to lock the rear axle at high speeds while in “4H.”
  • Selec-Speed Control manages vehicle speed in “4L” while traversing off-road terrain without requiring throttle or brake input. Selec-Speed Control is activated using a button on the dashboard and can be adjusted from 1-5 mph simply by using the Electronic Range Select shift control.

The Rubicon 392 handles low-speed downhill descents by using the 6.4-liter V-8’s engine braking, revised transmission torque converter lockup control, and a 48:1 crawl ratio to manage vehicle speed without the driver needing to use the brake pedal.

The new vehicle’s chassis includes upgraded frame rails, front upper control arms, and cast iron steering knuckles to take full advantage of the Wrangler Rubicon 392’s power and torque. It’s also equipped with heavy-duty brakes.

Augmenting the Jeep Wrangler’s proven five-link front and rear suspension, the Wrangler Rubicon 392 comes with a 2-inch factory lift and is fitted with specially tuned high-performance FOX aluminum monotube shocks to maximize handling and comfort.

The 2021 Jeep Rubicon 392 keeps to the original design theme of Wrangler with bold and functional cues, a wide stance and its recognizable trapezoidal wheel flares.

The Wrangler Rubicon 392 carries bronze accents on the hood, covers the front and rear tow hooks, and FOX Shocks’ decal outline. It also outlines the Jeep badge and the Trail Rated badge.

Adopted from the Jeep Gladiator Mojave, a 40-mm raised hood with aggressive appearance and hood scoop provide cold air intake and greater water fording capability. It also carries a “392” badge on each side, signifying the most cubic inches ever offered in a Jeep Wrangler.

The grille design delivers greater airflow and cooling of the 392 V-8.

Bronze wheels measure 17 by 7.5 inches and are beadlock capable with an optional black locking ring available through Mopar.

The leather-appointed interior includes bronze stitching. The leather seats with Rubicon 392 nomenclature has performance-inspired, integrated upper bolsters to hold occupants in place. To accommodate new engine specs, the gauge cluster receives all-new numbering and design. Available on the Jeep Wrangler for the first time, the leather-wrapped, performance steering wheel features wheel-mounted paddle shifters for fast access to the eight-speed transmission and torque management.

The Uconnect system projects on a standard 8.4-inch screen. Loaded in the software, Jeep Off-road Pages allow owners to monitor pitch, roll, altitude, GPS coordinates, drivetrain power distribution, and more.

The 2021 Jeep Wrangler Rubicon 392 is available in nine exterior colors: Black, Bright White, Firecracker Red, Granite Crystal Metallic, Punk ’n Metallic, Sarge Green Metallic, Snazzberry Metallic, Sting-Gray Metallic, and Billet Silver Metallic, all with a black interior.

The 2021 Jeep Wrangler Rubicon 392 includes 11 premium features, normally options on Jeep Wrangler, including:

  • Leather interior
  • Infotainment Group
  • HD electrical switch bank
  • Body-color hard top
  • Body-color flares
  • Steel Bumper Group
  • LED Lighting Group
  • Cold Weather Group
  • Remote proximity entry
  • Safety Group
  • Advanced Safety Group

After purchasing the Wrangler Rubicon 392, customers can shop from the comprehensive Mopar portfolio of Jeep Wrangler Rubicon 392 products, which will feature Jeep Performance Parts for the ultimate off-road adventure, including LED off-road lights, Rubicon winch, Ultimate Dana 44 Advantek front axle with gear ratios available up to 5.38, new off-road beadlock-capable wheels suitable for larger tires, tube doors, off-road bumpers, rock rails, and more.

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