The displacement only tells you so much. A 1914cc Type 1 could be 70 horses or twice that. You probably wouldn't like it at either of those extremes. At 100-125 or so, however, it's a nice, reliable engine with plenty of grunt that doesn't ask too much of its owner.
A 2110 could be 75hp or well above twice that. The 150hp combo from CB Performance redlines about 6000 rpm and is very well established and no harder to maintain than the 120 hp 1915. There's a reason a lot of guys love their 2110s.
A 2332 could be a disaster or it could be a revelation. Could be 85hp; could be 200+. A mild, carefully built one with 150 or so hp is going to really pull hard in the low end and midrange. A friend of mine bought a TD replica with one like that; he called it the "stump puller."
In a Speedster it will feel like a V8.