Roof Box Fuel Consumption

But the higher the speed the more affect they have.

Roof box fuel consumption.

I need to buy a roof box for my 2003 audi rs 6 to accommodate my family s expanding paraphernalia. A roof box we had a trailer before but hubby wants a roofbox now instead. Adding any roof box increases frontal area of your vehicle of course. I know its not an exact science but curious before i splash the cash.

I regularly travel in france and germany and am concerned that a roof box might increase my fuel consumption and mean that i have to drive more slowly ab london sw14. He found that compared to the baseline of no roof rack the empty rack reduced his mpg by 12 7 and the roof rack with a bicycle reduced it by a whooping 27 3. But no matter how aerodynamic it might look it also alters the flow of air around your carefully shaped wind tunnel tested. For comparison the additional fuel consumption caused by roof racks is about six times larger than anticipated fuel savings from fuel cell vehicles and 40 percent of anticipated fuel savings.

Roof boxes too are designed to be wind cheating so at low speed their impact on economy is negligible. He compared the gas mileage of his car at 54 7 mph 88 kph with 1 no roof racks 2 an empty roof rack and 3 a mountain bike on the roof rack. The gear with the most impact were the dual mountain bikes strapped to the roof which impacted the fuel economy by 31 percent or 9 mpg.