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Thread: Fuel Consumption - Towing TDV6 2.7

  1. #1
    Join Date
    Jan 1970
    Location
    Canberra
    Posts
    17,383

    Fuel Consumption - Towing TDV6 2.7

    I am interested in peoples thoughts on how well your fuel consumption is towing with a TDV6 2.7.

    I drove the 950 km from Canberra to Warrnambool to pick up a smaller campervan. On the way down I drove on one tank at around the speed limit and averaged 8.8l/100km (computer said 7.6).

    On the way back towing the 600kg van (about 165cm tall and a bit wider than the RRS) I was doing about 10kph slower than the speed limits and averaged 13.45l/100km.

    Now that in itself is very good fuel consumption for about 3.2tonnes train weight but it is over 50% worse fuel consumption compared to the unloaded state. Given the small size of the van I would have not expected fuel consumption to be so bad - I would hate to see what the consumption would have been had it been a full sized 2.5t caravan.

    The scan gauge was showing up 65l/100km when going up some hills on the Hume but also when speeds reduced to around 80kph on the straights fuel consumption reduced to near normal levels - so aerodynamics are coming into plan which is surprising for a small camper.

    So what sort of fuel consumption are others getting with their 2.7s when towing smaller campervans and larger campertrailers. With only 84l in the tank you start looking for fuel after only covering 400-450km.


    Thanks

    Garry
    REMLR 243

    2007 Range Rover Sport TDV6
    1977 FC 101
    1973 Haflinger AP700
    1971 Jaguar V12 E-Type Series 3 Roadster
    1957 Series 1 88"
    1957 Series 1 88" Station Wagon

  2. #2
    Join Date
    Jan 2011
    Location
    Brisbane
    Posts
    32
    We tow a van around 2.3t with our 2.7l D4 and on a recent trip from Brisbane to Yamba we had a fuel consumption of 14.4l/100km going down and 13.8l/100km coming back - it was quite windy going down. We were doing around 100k per hour for most of the trip. Not too many mountains except around the Ballina area. Our normal consumption is around 9.6l/100km in mostly urban driving.

    During the trip I noticed that from Caboolture (50k north of Brisbane) to the Gold Coast we were averaging 12.4l/100km. This was mostly flat highway driving.

    We have towed around 2000k so far and have never had an average figure above 14.8l/100km - this includes quite a few ranges around the South East Qld region.

  3. #3
    Join Date
    Jan 1970
    Location
    Padstow NSW
    Posts
    4,501
    towing my 950kg camper and the car loaded, i see on the dash anywhere
    between 11.5/100 and 14.5/100klm. just depends on hills, speed how much overtaking is done.

    cheers phil

  4. #4
    Join Date
    Apr 2008
    Location
    Sydney
    Posts
    124
    Seems about right.....hauled some of daughters furniture Mansfield to Orange in a garden trailer....10.4 L/100km normal on the Cooper Tyres I use, but around 16L/100km on this run.

  5. #5
    Join Date
    Jun 2010
    Location
    Australia - Grey Nomad
    Posts
    141

    Fuel Consumption - Towing TDV6 2.7

    Gday...

    I have D3 TDV6 Auto SE - tow a 2600kg tandem black-top touring van. I travel full time and have done about 27,000km in past 12 months.

    I have averaged 14.3ltr/100km overall for that time - towing and not towing. (calculated in my spreadsheet from actual litres against actual km from trip meter)

    Best I have had is 12.1ltr/100kph towing from Canberra to Richmond in Sydney. Worst I have had is 16.4ltr/100kph between Wentworth NSW and Broken Hill (head wind all the way).

    Overall I consider 450km from a tank is good - but often I get about 500-530km depending on terrain.

    I sit on around 90kph (about 2000rpm in 5th) and don't use cruise control except on very flat long (outback) terrain.

    Cheers
    John

  6. #6
    Join Date
    Nov 2008
    Location
    where every one holidays, sunny coast
    Posts
    1,712
    old man just got back from about 2.5k trip up north,,, d3 towing about 2.6t ish of caravan,, he said avg was 16ish,,, thats all at speed limit, he hates nothing more then a caravan going down a 110kph hway and find a caravan doing 80-90,

  7. #7
    Join Date
    Jun 2010
    Location
    Australia - Grey Nomad
    Posts
    141

    Fuel Consumption - Towing TDV6 2.7

    Quote Originally Posted by stig0000 View Post
    old man just got back from about 2.5k trip up north,,, d3 towing about 2.6t ish of caravan,, he said avg was 16ish,,, thats all at speed limit, he hates nothing more then a caravan going down a 110kph hway and find a caravan doing 80-90,
    Gday...

    ..... AHHHHH - the joys of being a retired old f**t living life in the left lane ...... smelling the roses ...... .... but that is what mirrors are for and basic courtesy to make sure 'convoys' are let through (as much as possible)
    Cheers
    John

  8. #8
    Join Date
    Dec 2010
    Location
    Parkdale, Melbourne
    Posts
    616
    This is a bit of a 'stating the bleeding obvious' post from me but, at ~14l/100km you're getting better economy towing a couple of tonnes of caravan than I get when I'm just driving. Gotta love those petrol V8's....
    Towing my 1500kg caravan can see me hitting single digit "mpg" figures, never mind litres / 10km.

    FWIW, friends with a 3.0l D4 are seeing 22mpg when towing a 2 tonne twin axle caravan with a fully loaded D4 (2 adults, 2 kids, all the gear for a month's holiday in the south of France). With his old D3 and towing my 3 tonne boat he averaged 21mpg on a 300 mile fairly flat run, which I didn't think was bad.

  9. #9
    Join Date
    Jan 1970
    Location
    Canberra
    Posts
    17,383
    Hmmm - so towing my little camper I am only getting marginally better fuel consumption that some of you towing full on vans - also compounded is that I seem to get better consumption that most of you when driving unloaded.

    Maybe it has something to do with the shape of a RRS compared to a D3/D4. The RRS being a Sport machine has a slippery shape and maybe instead of the van being in the wash of the tow vehicle it is in less disturbed air creating wind drag - the D3/D4 being more dumpy (like my 101) probably would have the small van in its vacuum area so creating less drag.

    A couple of other interesting things courtesy of the scangauge - tailgating B Doubles does improve fuel consumption by about 1l/100km. Engine temps, inlet manifold temperature, power production (for a given rpm) all increase when useage increase. Also when going up a hill and the engine starts to labour, fuel usage increases substantially when you change down.

    You play with these things when you are on a 10 hour boring drive.

    Oh - also the distance to go empty from the cars computer is exactly the same error as the l/100km readout, ie approx 10%. The l/100km low is about 10% and distance to empty reads about 10% high.

    Is there a way of adjusting the computer to give correct readings - the scan gauge is starting to show more accurate readings than the cars computer but you have to make sure you are consistent on how you do each fill.

    Garry
    REMLR 243

    2007 Range Rover Sport TDV6
    1977 FC 101
    1973 Haflinger AP700
    1971 Jaguar V12 E-Type Series 3 Roadster
    1957 Series 1 88"
    1957 Series 1 88" Station Wagon

  10. #10
    Join Date
    Feb 2010
    Location
    Darling Downs, Queensland
    Posts
    75
    Friends of ours have a petrol 200 series Land Cruiser. They've never seen less than 20L/100km, towing or not . We tow a big horse float, and economy is similar to the others towing big trailers here. Around 8L/100km on the highway without the trailer.

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