400hp 9.2ISL Cummins or 400hp C9 Cat

Same, same. Either engine will do an excellent job in THE EXACT SAME RV. Are you doing a fair comparison of the chassis, weight, weight ratings, towing capacities, etc.

We have a 2005 Revolution LE with the Cat C9 and love it.
Sounds about the same as the Cummins ISC we had...

I appreciate the feedback so far, and we've been sort of, sort of, looking at the earlier Fleetwood Revolutions which were built on the American Platform and the Spartan chassis, but weren't called American and not until about 2012 or so.
Looks like the 06 and 07 are Cat engines and the 08 being a Cummings.
Really like the 1 1/2 bath model and the quality look of these coaches in general.
So what about parts and labor costs between the two, if and when that's needed and something the average gear-head doesn't want to do for themselves?

Since a Cummins or a Cat are the most prevalent engines for MH's it's not something to fret about. Both are great engines. Noise??, I'm not sure you can tell the difference while driving. I hear a lot of both and they all sound the same to me unless the muffler has been changed than either is load outside.

jplante4 wrote:
FWIW, most Cummins seem to be a lot quieter than my CAT.

BUT, not sure it is reasonable to compare a 1996 to post 2004 engine.

Cummins B went from one of the noisiest to one of the quietest as injection systems "evolved".

The world has changed quite a bit.

BTW, I never found even the early Caterpillar engines to be "too noisy". Probably had as much to do with insulation as actual engine noise.

FWIW, most Cummins seem to be a lot quieter than my CAT.

Agree with previous response. If properly maintained, either engine should give you years of reliable service. Either one of them can be expensive if they break but that's just part of the deal owning a DP.

I would focus more on overall condition of the coach, build quality, maintenance records, and if it has an interior set up you can like and meets your needs.

Not sure I would put that engine choice in the top 5 of why I would choose a coach.

Said another way, lots of other things would be more important. Things like floor plan, condition, price, etc.