Q #471 - How will a roof rack affect your car's performance?
A roof rack increases your car's wind resistance. This will cause an increase in fuel consumption, so you should remove it when it isn't being used. An aerodynamically designed roof rack or box will help reduce wind resistance to a minimum, but the rack or box should still be removed when it isn't in use.
There will be less wind noise
The engine will use more oil
The car will accelerate faster
Fuel consumption will increase
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93%
Based on figures from 2017.DVSA National average 47%