The standard engine for all four 2021 Jeep Grand Cherokee models is Chrysler’s well-known 3.6-liter Pentastar V6, which mates to an 8-speed automatic transmission. The fuel-saving engine stop / start system has been fine-tuned to minimize the number of starts and stops associated with minor throttle movements, and active engine mounts are now used to reduce noise, vibration and hardness.
Also note: the 3.6-liter V6 mounts about 1.5 inches lower in the new chassis. This lowers the center of gravity and improves the cornering ability of this Jeep. It also helps the Jeep pass pedestrian impact tests in Europe, as it gives the hood more room to flex downward upon impact. Due to the lower engine, however, an axle shaft on 4WD models must now pass through the new cast aluminum oil pan.
Maximum towing capacity with peaks of 3.6 at 6,200 pounds and at 7,200 for the V8. The Jeep Grand Cherokee L, with a 23 gallon fuel tank and V6, has a range of nearly 600 miles.
Looking for more power? Order the 5.7-liter Hemi V8, which is optional on the Overland and Summit models. It develops 357 horsepower and 390 lb-ft of torque, giving the new Grand Cherokee L a maximum towing capacity of 7,200 pounds. This engine benefits from cylinder deactivation, which cuts off four cylinders on the highway to improve fuel economy.
A new front axle disconnect system further improves fuel economy. If the Grand Cherokee L detects that road conditions do not require all-wheel drive, the front axle automatically disconnects, placing the vehicle in all-wheel drive to improve fuel economy. The four-wheel drive automatically re-engages if necessary.
Three types of 4WD systems are available in the new Jeep Grand Cherokee L 2021.
Quadra-Trac I, standard on Laredo and Limited models, is a permanent single-speed 4×4 system. Quadra-Trac II, standard on the Overland, is an active 4WD system with a 2-speed transfer case and hill descent control. Quadra-Drive II, standard on the Summit, also has high and low ranges, but includes an electronic limited-slip rear differential. If you order the Off-Road Groupset on the Overland model, it comes with Quadra-Drive II.
Of note, the 2021 3.6-liter Jeep Grand Cherokee L has the same EPA fuel efficiency as a standard 3.6-liter Grand Cherokee, returning 19 mpg city / 26 mpg highway as 2WD and 18 City mpg / 25 mpg highway with 4WD.
The 2021 5.7-liter Jeep Grand Cherokee L, available with 4WD only, is rated by the EPA at 14 mpg city / 22 mpg highway.
290 horsepower at 6,400 rpm
257 lb-ft of torque at 4000 rpm
EPA city / highway fuel economy: 19 mpg / 26 mpg (RWD), 18 mpg / 25 mpg (4WD)
357 horsepower at 5,150 rpm
390 lb-ft of torque at 4,250 rpm
EPA city / highway fuel economy: 14 mpg / 22 mpg (4WD)