1 Numbers represent an ordering by significant words. Various colorings, defined here, differentiate National Historic Landmarks and historic districts from other NRHP buildings, structures, sites or objects.
- A Class A Motorhome, the largest and most luxurious of all RVs, has an average height of 10 feet, and can range from 21 to 40 feet in length. This RV typically requires a garage with a clearance height of at least 14 feet, and 45 to 50 feet in length depending on how much additional storage you wish to have. A Class C Motorhome, which has a distinctive cab-over bunk, has an average height of about 10 feet, and can range from 21 to 35 feet in length.
1 MPG-Large motorhomes may eat up a lot of fuel, but diesel engines are generally more fuel-efficient than gasoline RVs. 2  This extra efficiency can help offset the costs of diesel fuel. 3  The average gas motorhome usually gets around 6-10 miles per gallon, while a diesel RV should get you into the 8-14 mpg range.he added benefits and features of these vehicles means they often cost more than their gas-engine counterparts. New prices can range anywhere from $250,000 to $600,000. Used models on the other hand can be as low as $40-$60,000, even for some of the higher-end models.