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Harry Ferguson Tractors Discussion Forum
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Ferguson TEA20 vs. Triumph TR2-TR3-TR4

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Jesper Bering (Denmark)

03-24-2006 19:34:14

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Much have been said and written about the similarities between the Standard engines in Ferguson TEA20 and in Triumph TR2 etc. sports cars.

Do any of you know for sure if a Triumph cylinder head will fit the Ferguson engine without major constructional work? The question is, will I be able to tune a TEA20 or MF35 with gasoline engine by fitting such a head to it? My idea was to obtain a more powerful and higher revving engine that way.

Jim W commented on a similar question in september 2002 and wrote: I have both the Ferguson TEA20 and a Triumph TR3, and have rebuilt both motors. Jim, if you read this, please comment. My e-mail adress is Thank you.

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John (UK)

03-25-2006 07:57:37

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 Re: Ferguson TEA20 vs. Triumph TR2-TR3-TR4 in reply to Jesper Bering (Denmark), 03-24-2006 19:34:14  
Jim Wallace E-mail Address:- wallaces(at)

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Jesper Bering (Denmark)

03-25-2006 12:05:38

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 Re: Ferguson TEA20 vs. Triumph TR2-TR3-TR4 in reply to John (UK), 03-25-2006 07:57:37  
Thanks, John! Also to you, Barry.

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Barry from Stirling

03-25-2006 04:35:33

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 Re: Ferguson TEA20 vs. Triumph TR2-TR3-TR4 in reply to Jesper Bering (Denmark), 03-24-2006 19:34:14  
Good Morning from Ontario Canada Jesper. There is a gentleman who often posts on here by the name of Jim W. He knows quite a bit about this very topic. I havent seen him in a while, but he has a web-site dedicated to Fergusons and the Triumph. Once he sees this he will respond

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Jim W

03-26-2006 16:42:23

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 Re: Ferguson TEA20 vs. Triumph TR2-TR3-TR4 in reply to Barry from Stirling, 03-25-2006 04:35:33  
Hi here I am.
I have two TEA20s, and a TR3, and have rebuilt motors on both. The heads are substantially different, though a TR head would bolt onto a TEA block, and the same head gasket will fit either. The one thing you would need to pay attention to is the water pump location on the Fergie as it changed at some point, from being on the front of the block to the front of the head.
The TR heads have bigger valves and different valve springs. The intake and exhaust ports as I recall are in slightly different locations so you would need the manifolds from the TR as well. The TRs had twin SU side draft carbs; you would want to use those of course. Redline on the TR3 is 5000 rpm, at which point your Fergie would cruise along at about 40 mph in fourth gear. Now that would be scary...
Once upon a time I did see a picture of this conversion on the web someplace, but I could never find it again. It was someone in the UK.
From the Fergie webpage you can find the Triumph one.

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