There are two different types of Engines:
There is a lot of difference between RV’s with either type of engines. Primarily will be the price. The Gas Engine powered RV’s tend to be less expensive than diesel. The Gas powered RV’s also tend to be smaller. Gas Engine powered RV’s are usually more simple to maintain.
Diesel powered RV’s are more expensive, heavier and are more costly to maintain than the equivalent gas powered RV. They usually provide upgraded interiors to go with the higher price tag.
The following are must read articles for the buyers guide: