Petrol vs Diesel vs LPG vs Hybrid - pure math

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QQQ
QQQ Posts: 375 Forumite
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in Motoring
Over last 10 years of all money I spent on car depreciation, petrol and insurance, I spent roughly 60% on fuel, 30% on insurance and less than 10% on car depreciation and repairs.
Therefore I am thinking very carefully on how to reduce mpg on my next car.

Here is my question:
If I spent £100 driving a petrol car 70% in town and 30% on motorway, how much on average would I spend driving same type of car on same route but:
- with a diesel engine
- with LPG
- hybrid (and not plug in hybrid)

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  • System
    System Posts: 178,097 Community Admin
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    Diesel saves typically around 40% over petrol.

    LPG saves typically around 45% over petrol.

    Hybrid, don't know.

    All the above based purely on the cost of fuel/MPG, not any other differences.
  • happyc84
    happyc84 Posts: 325 Forumite
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    for figures to work, would be good to know:-

    average miles pa.
    how new were the cars?
    average mpg.

    over the last 10 years, my biggest cost has been vehicle deprecation.
  • Mercdriver
    Mercdriver Posts: 3,898 Forumite
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    Also on Hybrid, you'd need to consider whether plug in or other hybrid. If plug-in, you'd need to consider the costs of charging it on leccy
  • bigadaj
    bigadaj Posts: 11,531 Forumite
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    Tarambor wrote: »
    Diesel saves typically around 40% over petrol.

    LPG saves typically around 45% over petrol.

    Hybrid, don't know.

    All the above based purely on the cost of fuel/MPG, not any other differences.

    But diesel isn't going to give those savings with 70% town driving.
  • GunJack
    GunJack Posts: 11,676 Forumite
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    bigadaj wrote: »
    But diesel isn't going to give those savings with 70% town driving.

    no, but will still be a significant saving, probably more like 30%. I do most of my driving on the 30mile round trip to work which is much closer to the extra urban pattern, and have just changed from a 1.4L petrol to a 1.4l diesel and am expecting a 50%-ish increase in mpg on that journey (I can get 60mpg in a 2ltr Mondeo TD just doing that run, the 1.4 should get 65+)

    If it was 70% town I'd expect 30-35% improvement as the diesel won't get up to and maintain efficient temp so easily around town.
    ......Gettin' There, Wherever There is......

    I have a dodgy "i" key, so ignore spelling errors due to "i" issues, ...I blame Apple :D
  • Car_54
    Car_54 Posts: 8,234 Forumite
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    Mercdriver wrote: »
    Also on Hybrid, you'd need to consider whether plug in or other hybrid. If plug-in, you'd need to consider the costs of charging it on leccy

    But the OP said "hybrid (and not plug in hybrid)"
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