The Jeep 4.0-liter inline-six, also known as the AMC 242, may not have been the most powerful engine of its era – especially compared to Toyota’s 4.0-liter V6, which produced around 245 horsepower – ...

The ubiquitous Chrysler 4.0L inline-six was (and is) perhaps one of the best engines ever offered in a 4x4. Depending on chassis and model year, these engines carried a net power rating of 173-195hp ...

If you don't have one of the old and trusty 4.2L- or 4.0L-equipped Jeeps you probably had one in the past or have a buddy with one. So what do you do when you want to get some more power from a used ...

This engine was believed to have come from a 1998 Jeep Grand Cherokee, where it was rated at about 195 horsepower. The Jeep 4.0 inline-six is known for durability but failed here due to neglect.