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Thread: Why is the diesel heavy still?

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    Default Why is the diesel heavy still?

    I read the review of the new Nisan Qashqai

    1,6i / 2,0i / 1,5dci / 2,0dci
    1392/1437 /1471 / 1590 kg

    2,0 diesel is 150kg heavier than 2,0 petrol.

    Why is the diesel still so heavy and when can we expect for it to slim down.
    The performance of the diesel today is great, but they can be even superior if we can chop off 200 kg.

    BTW this nissan is expected to be a HIT, and a direct competitor to the Golf.

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    Default

    something to do with deisel engines still being made with a cast iron block maybe

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    Regular Member Ste's Avatar
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    Default

    Diesel engine have to be made far more robustly than petrols, as the compression ratios, and peak cylinder pressures are far higher. So they weight far more.

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    Default

    the D4D toyota is made of aluminium all the way....

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    Regular Member m8internet's Avatar
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    Default

    The Isuzu Y30 in the Vectra 3.0 V6 CDTI is also aluminium, reducing the weight
    One disadvantage is they do not like heat and warped cylinder heads can become an issue at high mileage

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    Regular Member Ian S100's Avatar
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    I thought the Vectra had a cast iron block & aluminium cylinder head!

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    Regular Member Ste's Avatar
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    Default

    Refer to my previous comment, it is true for whatever material is used

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    Default

    Also, aren't youe comparing the turbo-diesel car's weight to normally aspirated petrol engined ones? I think you'll find that having a turbo on any car adds maybe 50kg or so.
    Last edited by Hideous; 15th May 2007 at 09:12.

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    Default

    Was just looking on the "Vauxhall Product Forum", current car weights: -
    Hatchback 2.0i Turbo 16v SRi - 1456kg
    Hatchback 1.9 CDTi 16v (150) SRi - 1456kg

    i.e., the same for the current models of exactly the same trim.
    When comparing weights, the level of trim matters a fair bit.

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