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Old 10-20-2015, 08:53 AM   #1
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Fuel mileage Class A vs Class C

I am actively looking for a used RV, I have done some research and driven some of both A and C. There certainly are pluses and minuses on both but what is the real mileage difference? I see some larger Class A homes have almost the same fuel economy as some Class C rigs, what is the true story? Thanks in advance for your input.

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Old 10-20-2015, 09:26 AM   #2
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My 24' class C got about 10 mpg. My 30' class A does around 7. It's mostly about size/weight. I wouldn't (and didn't) consider "mileage" when I was shopping for the class A. If you figure it out, it comes to just a few bucks a year in extra fuel.. as apposed to an expensive rig you'll be buying twice.

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Old 10-20-2015, 09:38 AM   #3
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Class "C" with a V10 6 to 7 miles per gallon towing. My class "A" small ISB Diesel towing my Mini 8.9 to 9.5 miles per gallon. Difference is cost up front. DP is 3 or more times more expensive then a class "C" (usually). Other RVer's may disagree. Sanford
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Old 10-20-2015, 10:28 AM   #4
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I believe it is mostly due to weight and length, physics says more weight takes more energy. Approximately the same cross section of air being pushed for class C vs class A, a class A may be a bit more aerodynamic if one with the more rounded front vs squared off class C. However, it is still wide and tall section of air that must be pushed aside and through no matter what. A diesel engine will be a bit better for mpg, all else being equal.

As many have said, you don't buy an RV for gas mileage. Buy what you like and works for you, then just accept the fuel cost as being part of the overall costs.
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Old 10-20-2015, 02:18 PM   #5
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It depends what engine is in your class c. I have a 25' MB based MH and get 16 mpg. I have never owned a Class A so I can't speak on those. I will say the Ford V10 is a strong engine that will give you years of good service. A friend of mine has a 27' Coachmen Conchord with the V10 and has seen 11 mpg by keeping his speed at about 52 mph.
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Old 10-20-2015, 06:54 PM   #6
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I went from a gas powered 2008 Itasca Cambria 29H Class C to a gas powered 2015 Winnebago View 27N Class A, both with Ford V10 engines and Ford 5 speed transmissions. Ford re-worked the engine for the Class A to have 20% more max horsepower somehow, don't know if this reduced the cruising speed fuel economy somehow.

Both are about the same length. The View is about 2,500 pounds heavier. This is about as close to Apples to Apples as you can get comparing a Class C to a Class A.

My MPG on the Class A is about 20% less than the Class C was. But the improvement in storage space and comfort was well worth it for me.
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Old 10-21-2015, 09:42 AM   #7
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Our 2011 Winnebago View 24K (Mercedes Sprinter 3500 HD chassis with 5-speed automatic transmission) gets 15 mpg keeping the speed between 60 and 65 mph. Any faster and MOG falls since it has so much frontal area & drag. When we tow our 5,000 lb modified 2003 Jeep Wrangler Rubicon we get 13 mpg at 55 to 60 mph. The 3.0 liter Mercedes Bluetec turbodiesel is AMAZING with lots of torque to easily go up steep hills at full speed except when towing... Then does well but definitely goes slower.
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Old 10-21-2015, 10:42 AM   #8
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My 1983 Rockwood Gets about 8 mpg. keeping up with traffic.
It has a ford 460 in it.

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class a, class c, fuel

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