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  1. #1
    3rd Gear

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    diesel or petrol

    just a quick question which engine runs hottest diesel or petrol ie size for size which one warms up quickest

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  3. #2
    6th Gear

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    A petrol ebgine runs a lot hotter than a diesel one, and the warm-up phase is shorter too.

  4. #3
    Broken Byzan's Avatar
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    ^^ as stated above ^^
    There is a good few hundred degrees difference in the exhaust/combution temps

  5. #4
    dantdi's Avatar
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    Yep Yep Petrol runs lot hotter.
    Thats the only thing on diesels, on cold day if go start it up leave em idling dont get hot.

  6. #5
    "Stick a V8 in it!"

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    diesels run colder than petrols, and when under no load they run a LOT colder than petrols.

    Mates farm has a large perkins v8 derv powered generator, and you can start it up without bringing the generator online for testing purposes, it runs so cool in that mode you can actually touch the exhaust manifolds with the motor running, and yes they're hot, but not hot enough to burn you.

    Clearly if the generator was coupled in and it was producing the 200kw its designed to with the engine running full bore they'd melt your hand off, but its still weird to see.

    2000 A4 1.8T Sport Quattro Avant, Berry Pearl
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    1997 S4 - PPC £999 Challenge Track Car Build
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