The 4.0-liter straight-six made famous for its use in Jeeps in the Eighties and Nineties is known for many things, but power isn't one of them. It's a workhorse motor, meant to take abuse and run ...

Ask a dozen long-time Jeep fans their favorite engine, and you'll get a dozen answers, and they'll all raise some good points. The 6.4-liter Hemi V8 found in some of the newer Jeep Wranglers provides ...

Owing to its simplistic cam-in-block design, Jeep’s 4.0-liter straight-six is known for two things: Unflappable reliability and a lack of power. Its maximum of 190 horsepower and 235 pound-feet of ...