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Thread: Alfa 4cyl engines

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    Jedi Knight TRMark's Avatar
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    Alfa 4cyl engines

    Why are they mounted at about an 8 degree angle? The twin cam head is wide so I can't see it offers a lower hood. Oil pickup maybe? Restoring my old sports/racer with alfa 1600, the engine would fit better upright. It has a conventional steel sump, not the batwing. Also thinking of replacing the Alfa with a 1275, it would be more appropriate, since the front and rear suspensions, wheels are very early 50's Cooper. But the Alfa is light and put out good power.
    ex spec5 Mark

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    Obi Wan
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    Re: Alfa 4cyl engines

    No idea. Check out the ALFA message board or general ALFA questions.

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    Yoda waltesefalcon's Avatar
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    Re: Alfa 4cyl engines

    You should try asking Doc, he's our local Alfaista.
    Cheers,
    Walter
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    Jedi Knight TRMark's Avatar
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    Re: Alfa 4cyl engines

    Quote Originally Posted by waltesefalcon View Post
    You should try asking Doc, he's our local Alfaista.
    I was hoping he would see the post. I posted on the AlfaBB as suggested. Seems the only reason the engine is tilted is so the Webers clear the inner fender.
    ex spec5 Mark

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    Yoda waltesefalcon's Avatar
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    Re: Alfa 4cyl engines

    "Seems the only reason the engine is tilted is so the Webers clear the inner fender."

    That sounds like something Alfa would do.
    Cheers,
    Walter
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    Luke Skywalker LarryK's Avatar
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    Re: Alfa 4cyl engines

    Most Euro cars, Jag, Ferrari, Alpha have done this for low hood (bonnet) for aerodynamics.
    Larry K
    58 Jag 3.4 MK 1 auto under restoration, 57 Jag 3.4 MK1 manual ,
    03 Cooper S, 2011 Cooper S Countryman, 2011 Land Rover LR4 HSE LUX, 1964 Valiant V200
    Also had , 68 Cortina 1600E, 64 Spit 4 & 80 1500, 73 GT6 3, 71 XJ6, 79 XJ6, 86 XJS V-12, 53 XK120 OTS.

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    Great Pumpkin DrEntropy's Avatar
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    Re: Alfa 4cyl engines

    Sorry I'm late, Mark.

    Only explanation I ever heard was to accommodate the Webers. The '60's~'70's models I'm most familiar with used a "giubo" flex-joint at the trans output shaft and U-joints at the rear and middle, with a support bearing and slip-joint at the center. Always thought that giubo was a method to compensate for the canted engine. More compliant than a four-point U-J, less likely to wear as a result.

    That 1600 should put out much better power than a 1275! And certainly a more elegant piece of kit, as well.

    I love my iron block Brit engines but where twin-cam designs are concerned, Alfa takes the prize. I've personally owned 1300, 1600, 1750 and 2L Alfas, professionally worked on all at a dealership. The best for output vs. size and weight are the 1750's, IMHO.
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    Re: Alfa 4cyl engines

    I asked a friend who has three 4 cylinder Alfas. He pointed me to this discussion:

    https://www.alfabb.com/bb/forums/spi...not-level.html

    Altho' clearance is mentioned, there's also some weight given to "keeping valves in the oil" and "leveling the engine during high torque".

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    Jedi Knight TRMark's Avatar
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    Re: Alfa 4cyl engines

    I did not find that discussion when I searched the alfabb so I started one. https://www.alfabb.com/bb/forums/eng...ine-angle.html I received a different set of answers and a discussion about Webers. I am not buying the leveling during torque argument. Alfa engines seem to tilt 5 to 8 degrees, that is a lot of torque movement to bring to level, more than broken motor mounts. The oiling issue was not brought up in my thread. And yes nothing looks better in a sports/racer then a twin cam.
    ex spec5 Mark

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