[b]All:

I was overly simplistic in my original comparison, I should have specified engines that were similar other than the total displacement. The two Maggies I used as an example are in effect the same engine, differing only by a few thousandths inch bore, and the selling price.

Eric:

Webra 50? Depends on the application. Purely grunt power? Your 50 is going to wipe my 40. All out speed? I'll use a Q40, it will not only out turn your Webra, it will at least keep up with it also. And just might walk away from it. With our normally grossly overpowered planes a 40, in most cases, can't be told from a similar 46.

Going from a 40 to a 55, an engine that's almost 40% larger, you're almost guaranteed a difference you can see.

Fiend:

Going from an OS "LA" engine to an "FX" is again not a valid comparison. Even though the LA is ridiculously expensive for a "Starter" engine, that's all it is. The FX was a fairly good and powerful sport engine. Had it not been overpriced and ABN construction it would have been an excellent engine. Absolutely no comparison the the LA.

Bill.