Imho, Winnebago makes a great motorhome. I worked for Cummins for years. I have attached a link below for you to use. Put in the VIN and it will give you the factory equipped engine size and specs.
I now am an RV consoltant and use this link to ID engines. Hard to see past the radiator some times.
ISL OR ISC are both great and can be programmed for hp ratings.
http://www.gates.com/catalogs-and-resources/resources/repository/engineering-business-applications/vin-decoder/vin-decoderJust made link clickable.
Dick