Jeep 4.0L Engine Specs

by Justin CuplerUpdated July 26, 2023
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Jeep 4.0-Liter Engine Specs

The 4.0-liter engine had 12 overhead valves, and a 3.88-inch bore and 3.41-inch stroke, resulting in an 8.8-to-1 compression ratio. It produced 190 horsepower at 4,600 rpm and 235 foot-pounds of torque at 3,200 rpm. In the Wrangler, with the six-speed manual transmission mated to it, this engine earned mileage ratings of 13 mpg city, 17 mpg highway and 15 mpg combined. With the auto transmission, the ratings dropped to 13 mpg city, 16 mpg highway and 14 mpg combined.

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