Discovery 4 - petrol vs diesel





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  1. #1
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    Default Discovery 4 - petrol vs diesel

    In real worlds conditions (urban and open road) how big a difference is there in consumption between the v8 petrol and sdv6 .
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  2. #2
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    Default Re: Discovery 4 - petrol vs diesel

    I don't know about the V8, but the TDV6 wasn't great either. We got average 14L/100KM in town.
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  3. #3
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    Default Re: Discovery 4 - petrol vs diesel

    My V8 gave 5km/L in town and 6.5 open road (120km/h cruising). This was calculated tank to tank.

    SDV6 claims are about 8-9 km/L in town and 10 km/L open road IIRC.

    There's been a few threads on this, a search will shed more light. The difficulty lies in sifting the computer indicated claims from real world tank to tank calculations.
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  4. #4
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    Default Re: Discovery 4 - petrol vs diesel

    Quote Originally Posted by 4xhilux View Post

    SDV6 claims are about 8-9 km/L in town and 10 km/L open road IIRC.
    I would love to see that in real life, measured tank to tank.

    Mine is fitted with a roof rack and off road biased tyre tread, and I get 13.5L/100km in town, and 12L/100km open road at 120km/h. I get 10km/l when cruising around in the Kruger at 40km/h.
    Last edited by faniedup; 2020/01/10 at 09:22 AM.

  5. #5
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    Default Re: Discovery 4 - petrol vs diesel

    Not a D4 but I know that my D3 V8 is super heavy driving in town. 4-4.5km/l. Gave me 6.8km/l towing my Gypsey 4 to Sodwana. She is much better without anything at the back. Some claim 8-9km/l on the open road for the V8.
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    Default Re: Discovery 4 - petrol vs diesel

    Henk
    So understand
    Don't waste your time always searching for those wasted years
    Face up, make your stand
    And realize you're living in the golden years

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    Default Re: Discovery 4 - petrol vs diesel

    Quote Originally Posted by Henkus View Post
    Not a D4 but I know that my D3 V8 is super heavy driving in town. 4-4.5km/l. Gave me 6.8km/l towing my Gypsey 4 to Sodwana. She is much better without anything at the back. Some claim 8-9km/l on the open road for the V8.
    Ja, probably indicated on the computer, I cannot see that that is achievable in the real world. That said, my V8's computer did once indicate 10 km/L over about 20km, after basically free wheeling down a mountain pass from Sutherland to Matjiesfontein.
    Current: Touareg V6 TDi
    Ex: Discovery 4 V8 - Sold at 149 000 km. Awesome vehicle, but a bottomless pit.
    Ex: Fortuner D4D - Best vehicle I've owned Sold at 267 000 km.
    Ex: Hilux 2.7i - sold at 241 000 km.
    Ex: Hilux D4D - sold at 330 000 km.

  8. #8
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    Default Re: Discovery 4 - petrol vs diesel

    Real world tank-to-tank fuel consumption measured over 190 000kms - from "normal driving" to overlanding with roofrack and towing a trailer is 13.5 litres per 100 km. Its an average over many kms, over various condition so should be a good approx. of reality. The lowest I have recorded over the period is 10.2 l/100km and the highest of 35l/100 km in thick sand.Can't say what the V8 would be over the same period/condition - but this would give insights into the diesel. Of course no where near what the onboard computer reads or what LR claim

  9. #9
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    Default Re: Discovery 4 - petrol vs diesel

    D3 V8 2007 6Km/L town and open road towing camping trailer 6,7Km/l and non towing 7Km/L even 7.8Km/L if sticking to 100k/hr and no itchy foot.

    Better consumption than my Triton by far.

    Friend with Disco 4 V8 HSE beats my D3 consumption all the time real terms not computer dreams. Our families do some traveling/touring together.
    Last edited by theunsb; 2020/01/12 at 05:14 PM. Reason: Extra relevant info compare D3 to D4
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  10. #10
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    Default Re: Discovery 4 - petrol vs diesel

    D4 TDV6 XS - Fuel consumption very right foot sensitive. Trip computer about 2L/100km optimistic.

    Below figures Tank to Tank.

    • Best achieved on Open road trip to Moz was 8.86L/100km. Speed about 120km/h. Loaded, but no load bars or trailer.
    • While towing the Desert Wolf Leo, it will quickly move to 14L/100km. Could get this down to 12,5-13L/100km averaging 100-110Km/h.
    • Averaging home to work (Waverley to Centurion) Mixed driving, around 10L-10,5L/100Km.
    • With a heavy foot it will jump to at least 13L/100Km.


    Fuel consumption very similar to my TD5s, except the right foot reacts immediately and one could pass a truck on an incline with a loaded trailer easily.

  11. #11
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    Default Re: Discovery 4 - petrol vs diesel

    So obviously the petrol is quite a bit heavier. Is it worth it for the extra power?
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    Default Re: Discovery 4 - petrol vs diesel

    In reality I'd say probably a 2km/l difference.
    Disclaimer - All my posts on this forum is without prejudice, is based on my fair assumptions or perceptions, is in no way intended to cause harm to anyone and is acted upon at your own discretion.

  13. #13
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    Default Re: Discovery 4 - petrol vs diesel

    Quote Originally Posted by Staalburger View Post
    So obviously the petrol is quite a bit heavier. Is it worth it for the extra power?
    From discussions I had with Walter the maintenance on the petrol is WAY less than on the diesel, especially as your mileage increase. Overall I would say the petrol is a cheaper vehicle to own despite being heavier on fuel. You also don't have the crank risk, but will have to spend money a new water pump once in a while.
    Current: Touareg V6 TDi
    Ex: Discovery 4 V8 - Sold at 149 000 km. Awesome vehicle, but a bottomless pit.
    Ex: Fortuner D4D - Best vehicle I've owned Sold at 267 000 km.
    Ex: Hilux 2.7i - sold at 241 000 km.
    Ex: Hilux D4D - sold at 330 000 km.

  14. #14
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    Default Re: Discovery 4 - petrol vs diesel

    besides the diesel vs petrol bill, the main advantage of the V8 over the T/SDV6 is that any issues with the V8 can be fixed pre-emptively, whereas there is no known predictor for the crank going bust on the T/SDV6.

    for example, the water pump can be replaced every so often for peace of mind; the timing chain can be inspected and replaced if need be, etc.
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  15. #15
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    Default Re: Discovery 4 - petrol vs diesel

    Real world consumption, measured by fuelio, but is also out by 8% due to tyres circumference is: approx. 18.5l/100km (so that's actually about 17.1)

    That's daily driving with steel bumpers, sliders, roof rack, lifted by 3cm permanently, etc.
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  16. #16
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    Default Re: Discovery 4 - petrol vs diesel

    Quote Originally Posted by 4xhilux View Post
    My V8 gave 5km/L in town and 6.5 open road (120km/h cruising). This was calculated tank to tank.SDV6 claims are about 8-9 km/L in town and 10 km/L open road IIRC.There's been a few threads on this, a search will shed more light. The difficulty lies in sifting the computer indicated claims from real world tank to tank calculations.
    Quote Originally Posted by faniedup View Post
    I would love to see that in real life, measured tank to tank.Mine is fitted with a roof rack and off road biased tyre tread, and I get 13.5L/100km in town, and 12L/100km open road at 120km/h. I get 10km/l when cruising around in the Kruger at 40km/h.
    You cant compare a roofrack / offroad tyres - fitted car to stock and shoot quoted figures down like that.I managed up to 11.5kmpl doing 115kmph gps speed with it when I got it. Pump to pump (my OBC is optimistic by 1.5 btw)currently I get 9kmpl with bigger tyres, cooper at3s as well as huge howling moon 1.8m RTT doing 100kmph GPS speed.Did Baviaans and Lesotho as well and consumption never went below 7.2kmpl.2014 8speed SDV6

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