I am not a techie on this stuff, but there must be some difference in the hybrid features of the camry vs prius. On my old camry I was getting 33.5 for best MPG average - on long highway trips would get 36. This was on a gas engine. I wanted to go as Green as possible so I went to the prius. I also needed to get a car that qualifies as a "green" commuter car to drive on the NYS Thruway. Camry did not qualify. I am hoping that I can get used to losing some of the things I loved about the camry - the sunroof for 1. Being as green as possible is very important to me and the camry just wasn't going to cut it. Hopefully that answers your questions as to what I meant by "full hybrid".