Portland, Maine - Normally when you hear the term "over the top" in the same sentence with Jeep, you figure it's about the top of a mountain pass.But if you are talking about Jeep's new-for-2018 Grand Cherokee Trackhawk, it's over-the-top with a simply silly level of power. By putting the HEMI V-8 engine which powers Dodge's Hellcat, the kids can get dropped off at school in a 707-hp.