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The only figures I have handy are US-specs from a 914. I have an owner's manual for a 412 but not with me.
The 1.7 liter (90x66mm = 1679cc) generated 80hp. The 1.8L was bored to 93mm (1795cc) but was listed as only 79hp as the compression ratio was dropped from 8.2:1 to 7.3:1. The 2.0L (94x71mm = 1971cc) had 95hp with a 7.6:1 c/r. I am quite certain these hp ratings were not at the wheel. I didn't see any torque ratings.
The next two engines in size by popularity are the 2056cc and the 2270cc. Of course, there is a lot more to the story than size. Jake Raby has many different versions of the 2270 for example -- each with differing specs and purposes. It's all in the combo is a catch-phrase of his he should have copyrighted, trademarked, or whatever legal category it would fall into.
I am sort of pondering a similar issue as you. I placed my engine plans on the back-burner while taking care of house renovations and smaller issues with my cars. There may be an opportunity that can't be passed up. I have my own investigating to do.
Your situation poses two main questions. The first is: What are your plans? Are you looking to put your engine together, then do upgrades? Do you have a power band you are specifically looking for?
The second question is: What is your ballpark budget? Is the money now available, or is becoming available in portions over time? Do you do your own work (like boring out cylinders)? One person's "limited budget" is another's small fortune and someone else's chump change.
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