ORIGINAL: opjose
I'd revise that down a bit... though some gasser engines are more powerful for a given size than others.
1.80 4-stoke glow =~ 30cc gas
1.20 4-stoke glow =~ 26cc gas
.91-1.00 4 stroke =~ 20cc gas
35cc 2-st glow ( e.g. BGX-1 OS engine ) =~ 50cc
good revision..... the other list is outdated....todays reed inducted gas motors are pretty much on par with the same displacement glow engines....
my dle 20 puts out what my 120ax and saito 150 does and my 30cc vs 1.60fx