Os.18 TZ Turbo With Pull
Displacement: 0.183 cu in (3.0cc)
Bore: 0.629" (16.0mm)
Stroke: 0.590" (15.0mm)
Practical RPM: 3,000-34,000
Output: 1.8ps @ 29,000 RPM
Weight: 7.8oz (222g)
I can't imagine the sirio being much better,maybe .2-3hp more,and maybe more rpm.