For the 2023 model year, nearly all Wagoneers have a twin-turbocharged 3.0-liter inline six-cylinder engine. This so-called “Hurricane” power plant replaces the previous 5.7-liter “Hemi” V8 in all but the base Wagoneer in standard-length format, and, compared to the rumbling Hemi, Jeep says it reduces carbon emissions by 15 percent while improving the SUV’s fuel efficiency.
Power and torque rise and are available at lower rpm. The twin-turbo inline six (I6) generates 420 horsepower at 5,200 rpm and 468 pound-feet of torque at 3,500 rpm. Meanwhile, the old 5.7-liter V8 supplies 392 hp at 5,600 rpm and 404 lb-ft of torque at 3,950 rpm. The new “Hurricane 420” engine provides up to 10,000 pounds of maximum towing capacity, more than any other large SUV.
Premium fuel is recommended for the new Hurricane engine, but is not required. Jeep says it should get 20 mpg in combined driving with 2WD and 19 mpg with 4WD, improvements of 2 mpg in each measure. Unfortunately, on a 56.4-mile test drive in the mountains and across the plains northeast of Bozeman, Montana, the trip computer produced a questionable result, so we cannot report a real-world fuel economy number at this time.
The Hurricane 420 employs an eight-speed automatic transmission, and it powers the rear-wheels unless you opt for a 4WD system. Note that with 4WD, towing capacity drops to 9,850 pounds.
Our test vehicle had Quadra-Trac I, a full-time single-speed 4WD system perfect for people who don’t have any plans to head far off the beaten path. You can get a Quadra-Trac II 4WD system with a two-speed transfer case if you think you’ll need it. It comes in an optional Advanced All Terrain Group package that also equips the Wagoneer L with 18-inch wheels with off-road tires, an electronic locking rear differential, skid plates, and Selec-Speed Control, which is an off-road, low-speed cruise control system that also includes hill ascent and descent control.
Used in conjunction with the Wagoneer L’s standard all-season tires, the Selec-Terrain traction system’s Sand/Mud mode, and the optional Quadra-Lift air suspension, Quadra-Trac I helped us to scramble up a hill to snap photos with Montana’s snow-capped Crazy Mountains serving as the backdrop. The other Selec-Terrain modes include Auto, Sport, Rock, and Snow.
Jeep equips the Wagoneer L with the same independent front and rear coil-spring suspension you’ll find on the standard Wagoneer. However, it is re-tuned (along with the steering) to ensure that the longer Wagoneer L rides and handles like the shorter standard-wheelbase version. With the standard suspension, the Wagoneer L offers 8.3 inches of ground clearance.
If you add the Quadra-Lift air suspension to the SUV, it comes with semi-active damping to enhance the driving dynamics. It features several settings including Park (drops the SUV 1.6 inches), Aero (drops 0.6 inches on the highway), Normal (8 inches of clearance), Off-Road 1 (9 inches of clearance), and Off-Road 2 (10 inches of clearance). With Quadra-Lift, maximum water fording capability measures 24 inches.
In just a couple of hours, we traveled on nearly every type of road except for Interstate 90, the only freeway in the Bozeman area. Regardless of the terrain and despite the elevation, the twin-turbocharged Wagoneer L Series II accelerated quickly enough, handled well enough, and took us places a typical crossover likely couldn’t. However, several things about the SUV stood out for comment.
First, the engine is smooth, quiet, and refined. Unlike the twin-turbo V6 in a Ford Expedition, which makes a chuffing sound when accelerating, or the rumbling V8 engines found in rivals from Chevy and GMC, the Jeep’s I6 doesn’t intrude upon the cabin. Depending on your preferences, that might be a good thing or a bad thing. We liked it.
Second, turbo lag is an issue with the Hurricane 420 (and the Grand Wagoneer’s Hurricane 510). Stomp on the accelerator pedal from a stop, and it takes a couple of seconds for the engine to collect its wits and surge the Jeep forward. Once you’re moving, part-throttle response is quicker, but the delay is still noticeable.
Third, there is a distinct difference in acceleration between the Wagoneer L’s Hurricane 420 and the Grand Wagoneer L’s more powerful Hurricane 510. If you test-drive the 510, you’re going to want to find the budget to get it. Nevertheless, the 420 is strong and rewarding enough in this application.
Fourth, our test vehicle’s 20-inch wheels and 275/55 Bridgestone Dueler H/L Alenza all-season tires provided a significantly smoother ride than the 22-inch wheels and 285/45 Goodyear Eagle Touring tires we experienced on the Grand Wagoneer L Series III. The Wagoneer L’s smaller wheels and tires allowed a little more lean in curves, and they don’t fill out the wheel wells in as satisfying a manner, but the superior ride quality and reduced road shock are worthwhile considerations.