my bad, just assumed the engine was the same as in the current Cherokee (UK model, think its liberty or something in US).
Difficult to find much info really the Jeep website SUCKS! it really does. No proper pics limited info, plenty of pointless waffle though.
Anyhow if this new unit it an OHV and a long stroke then it stands a chance of being very nice, although the new Jeep does appear to weigh more than previous versions. But hay that's modern car design for you.
Still the theory of HP, torque and rpms is still relative.