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  1. #1
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    Default Trailer vs. Roofbox

    I was wondering if anyone has compared the fuel consumption penalty between towing a luggage trailer vs. having a roofbox (Thule or similar) on the roof rack?
    I have done a bit of long distance with a Venter 6 foot trailer (actually too big for my needs) and I was surprised at how big a difference it makes (looks like 1.5l/100 Km at 125km/h). This got me thinking on how a roofbox would compare.

    Has anyone done the comparison?


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  2. #2
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    Default Re: Trailer vs. Roofbox

    In terms of volume and weight capabilities, you cant really compare the two.
    See the discussions elswware on the weight limitation of roof racks



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  4. #3
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    Default Re: Trailer vs. Roofbox

    Huge difference in volume.
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  5. #4
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    Default Re: Trailer vs. Roofbox

    Thanks, I was asking regarding fuel consumption specifically and I did say a trailer was actually much too big for my needs.

    I probably wouldn't use a roof box as I have access to a trailer and the capital expense of a roof box would probably take many years to save in fuel (if it is actually more economical to use).

    I was actually just wondering if anyone has tried both and what the fuel consumption penalty is for a roof box.


    '12 Audi Q5 3.0 TDi quattro stock standard

    '07 VW Touareg (T2) 3.0 V6 TDi (BKS), Air Suspension, Centre and Rear diff locks, DeCAT, 265-65R17 muds - Sold

    '01 Jeep WJ Limited 4.7 V8 with some bits - Sold
    '83 Range Rover Classic 3dr 3.5 V8 Rust bucket - Sold

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  7. #5
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    Default Re: Trailer vs. Roofbox

    According to google, 20 to 35% increase in fuel consumption for a roofbox.
    Fortuner D4D
    Hilux 2.7 4x4 Raider.
    Sp Tourer

  8. #6
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    Default Re: Trailer vs. Roofbox

    Did some google searching as well as searching the forum and it seems results vary wildly depending on vehicle and speed travelled. I guess that result is to be expected, so only real way to get an answer would be to rent a roof box and test on my own vehicle.


    '12 Audi Q5 3.0 TDi quattro stock standard

    '07 VW Touareg (T2) 3.0 V6 TDi (BKS), Air Suspension, Centre and Rear diff locks, DeCAT, 265-65R17 muds - Sold

    '01 Jeep WJ Limited 4.7 V8 with some bits - Sold
    '83 Range Rover Classic 3dr 3.5 V8 Rust bucket - Sold

  9. #7
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    Default Re: Trailer vs. Roofbox

    I have a Thule roof box, can take say 5 60lt duffle bags. Took it to mana pools. Not as big as a trailer, but from a fuel efficiency point of view I recon it added maybe 0.2 Lts /100kms. Cruising speed aprox 110 km/hr

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