How different are the 3A9* engines from one another?

[GrnBn]

Surely, the only difference can be in terms of piston length? There is only 15mm of difference in stroke between the 3a90 and the 3a92, and economy of design wouldn't allow for much else to change...

[Ares]

Why are you interested? Planning to get parts to transform your engine?

[MetroMPG]

Just FYI, links for additional info/specs (doesn't necessarily answer the question):

3A92 1.2L 3-cylinder Mirage / Space Star engine info (specs, specifications)

3A90 1.0L 3-cylinder Mirage / Space Star engine info (specs, specifications)

[GrnBn]

Thanks Metro, but I'd need actual measurements on the internal components. Connecting rods, pistons, possibly crankshaft differences... I'm just doing some research for now Ares, but it could lead somewhere down the road.