I'm shopping for a 2008/2009 Grand Cherokee Limited. I was surprised to find that the mpg specs for the 4.7L V8 are only 1 mpg better than for the 5.7L Hemi on NADAguides.com.

I would expect that the mpg of the much smaller 4.7L engine would be somewhere in the range of 3 - 4 mpg better than the 5.7L Hemi.

Can anyone offer a rationale for what I'm seeing on NADAguides.com and/or confirm that my expectation is about right?

 

I would chose a 5.7 over a 4.7 all day, more reliable, more power, and about the same fuel mileage, the 4.7 doesn't have a great track record when it comes to reliability.

 

Thank you