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Thread: 1231 (818.202) engine

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    1231 (818.202) engine

    With the first series Fulvia Coupe 1.2 there was also an 1231 engine (818.202) used.
    Is there some documentation when this was done (chassisnumber)? I could not find it from the parts document.

    The chassisnumber of mine 1.2 from '67 is 818.130 019093. It has the aloy doors, hood and bootlid.


    thanks Rob

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    Legendary Lancista Marnix's Avatar
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    Re: 1231 (818.202) engine

    It is in the parts catalog (very first tav.), footnotes

    818.130 car: from nr. 19600 (LHD), 19652 (RHD)
    Lancia Fulvia 2C 1964
    Lancia Fulvia Coupe Rallye 1,3 1968
    Porsche 924 1979
    Alfa Romeo 33 1.4IE 1993

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    Active Lancista Castagnero's Avatar
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    Re: 1231 (818.202) engine

    So the type car 818.130 can have 818.202 (1231cc) engine and the 818.100 head originally?

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    Re: 1231 (818.202) engine

    Yep
    Lancia Fulvia 2C 1964
    Lancia Fulvia Coupe Rallye 1,3 1968
    Porsche 924 1979
    Alfa Romeo 33 1.4IE 1993

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    Re: 1231 (818.202) engine

    Yep, I did not know that too until I spoke with Marnix (thanks!)

    The 1231 engine has the same stroke as the 1,3 engine (818.302), the stroke is 69,7 mm
    The stroke of the 1216 engine is 67,0 mm

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    Re: 1231 (818.202) engine

    OK, just for general information, how I think the changeover from the 1216cc 818.130 to the 1231cc 818.202 engine came along. It is an "educated guess".

    When they wanted to introduce the 1298cc (first the 818.140 for the 1.3HF, then the 818.302, later the 818.303) engine, a redesign was needed, as the original 1100cc, later 1200cc, block couldn't be enlarged anymore. The redesign involved quite some changes, like different crankshaft etc.

    The 1216cc engine was based on the original 1100c design of the "normale" (or maybe it was already a different design from the Berlina 2C 818.100 1100cc, not entirely sure about that). They decided they could as well use the opportunity to change the 1216cc engine. The 1231cc engine is essentially the same as the 1298cc engine, but with the cylinder block of the new 140/302/303 engine bored only at 75mm instead of the 77mm for the 1298cc 302 engine. You will find the number 302 on the 1231cc cylinder block, as it is the block for the new 1298cc engine, only bored out at a smaller diameter. They retained the head of the 818.100 (the 2C Berlina) for the 1231cc (as far as I can make out from the parts catalog), while for the 302 engine they used the head of the 1.3HF 818.140 engine previously developed for racing (and which was the basis for the new 1298cc engine design in the first place).

    It makes for a quite confusing mixture of engine identification numbers on the different engines. One of the reasons why it is often quite hard to find out what engine is exactly in the car (some cars had their engine replaced by an "upgraded" more powerful version over time).

    The reason to retain a 1200 version is partly due to tax reasons: in some Mediterranean countries (Italy, Greece) the tax was (is?) based on cylinder volume, not BHP. Hence small volumetric engines, but high revving, with lots of BHP for the small engine size.
    Lancia Fulvia 2C 1964
    Lancia Fulvia Coupe Rallye 1,3 1968
    Porsche 924 1979
    Alfa Romeo 33 1.4IE 1993

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    Re: 1231 (818.202) engine

    It's actually more straightforward than it seems. The changeover from the 1216 (818.130 / 818.140) to the 1231 (818.202) was to rationalize production once the larger, 1298 engine was introduced in 1967.

    As Marnix says, the 1216 was based on the original 1091 (818.000 / 818.100), which had a V angle of 12°53'28" and a bore/stroke of 72/67. To make the 1216, the bore was simply increased to 76.

    When the enlarged 1298 (818.302 / 818.303 / 818.342) was introduced, it was given a new V angle of 12°45'28" and a bore/stroke of 77/69.7. To conform the "1.2", it was changed to the new V angle and stroke, but with a 2mm narrower 75 bore for 1231 as 818.202.

    Ed Levin
    Fulvia 1,6 HF

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    Active Lancista Castagnero's Avatar
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    Re: 1231 (818.202) engine

    Quote Originally Posted by Marnix View Post
    ......

    You will find the number 302 on the 1231cc cylinder block, as it is the block for the new 1298cc engine, only bored out at a smaller diameter. They retained the head of the 818.100 (the 2C Berlina) for the 1231cc (as far as I can make out from the parts catalog), while for the 302 engine they used the head of the 1.3HF 818.140 engine previously developed for racing (and which was the basis for the new 1298cc engine design in the first place).

    ......
    Where is the number 302 on the 1231cc engine?

    For me it's quite confusing indeed!

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    Re: 1231 (818.202) engine

    Quote Originally Posted by Marnix View Post
    ...
    You will find the number 302 on the 1231cc cylinder block, as it is the block for the new 1298cc engine, only bored out at a smaller diameter. They retained the head of the 818.100 (the 2C Berlina) for the 1231cc (as far as I can make out from the parts catalog), while for the 302 engine they used the head of the 1.3HF 818.140 engine previously developed for racing (and which was the basis for the new 1298cc engine design in the first place).
    ...
    Where can i find the number 302 on the 1231cc engine?

    It's confusing indeed!

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    Legendary Lancista Marnix's Avatar
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    Re: 1231 (818.202) engine

    it is on the cylinder block, at the side, somewhere below/ behind the carbs.
    Lancia Fulvia 2C 1964
    Lancia Fulvia Coupe Rallye 1,3 1968
    Porsche 924 1979
    Alfa Romeo 33 1.4IE 1993

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