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Discussion Starter #1 (Edited)

Quick question (not sure if anyone here knows the answer); what are the physical hardware differences (if any) between the 108hp 1.5L engine in the Mazda2 and the 138hp 1.5L engine in the ROW MX5? I remember reading about how both 155hp 2.0L engines found in the Mazda3 and the MX5 were mechanically identical despite having vastly different driving characteristics (which I suppose is 100% attributable to software and trans gearing).

I guess in other terms, would an "MX5 ECU swap" transform a Mazda2 from ordinary to extraordinary? (negating any other function being handled by the ECU) I'm trying to convince myself to moving from a compact to a subcompact for my next daily and I'd like to know if there was any way to make it more palatable.


edit : pics for clicks

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