Jeep 4.0L Engine Specsby Justin CuplerUpdated July 26, 2023
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.
Justin Cupler is a professional writer who has been published on several websites including CarsDirect and Autos.com. Cupler has worked in the professional automotive repair field as a technician and a manager since 2000. He has a certificate in broadcast journalism from the Connecticut School of Broadcasting. Cupler is currently studying mechanical engineering at Saint Petersburg College.