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diesel or petrol

Discussion in 'A4/S4 forum(B5 Chassis)' started by yendall24, Nov 23, 2008.

  1. yendall24
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    yendall24 Member

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    [Nov 23, 2008]
    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. Siena
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    Siena Active Member

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    [Nov 23, 2008]
    A petrol ebgine runs a lot hotter than a diesel one, and the warm-up phase is shorter too.
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  4. Broken Byzan
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    Broken Byzan Photographic Moderator Staff Member Moderator VCDS Map User

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    [Nov 23, 2008]
    ^^ as stated above ^^
    There is a good few hundred degrees difference in the exhaust/combution temps
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  5. dantdi
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    dantdi ...

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    [Nov 24, 2008]
    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.
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  6. aragorn
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    aragorn "Stick a V8 in it!" Staff Member Moderator VCDS Map User

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    [Nov 25, 2008]
    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.
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