Which used Jeep Cherokee 4x4 should I buy?
While the 3.7 is better than the 4.0 six-cylinder engine of the previous Cherokee, it's no ball of fire. You have to work it hard to make reasonable progress, so it often sounds strained. It's also very thirsty. The four-cylinder 2.4 guzzles slightly less, but it isn't the most refined or the strongest performer.
So, one of the diesels is the default option, and the 2.5 and 2.8 engines both churn out a hefty amount of pull, which is ideal for towing, off-roading and easy-going everyday response. They are far easier on fuel than the petrols, but they still get noisy when revved.