Much more power, MPG about the same 7 to 7.9 in the flatlands and towing, 6 to 7 in the mountains towing. Average speed 63 to 64 MPH ( just below or at 1500 RPM's). I have found over 1500 RPM's the MPG starts to go down. Engine temp by the Aladdin 204 to 208 about the same. I think the temp is actually less but that is what the Aladdin says. My coach is a 2008, Rome with a 400 HP engine.
Marty
2008 Contessa, 400HP