Stock it is 115Hp and 2370# (down 12Hp and 143#'s less than the EX). I believe the engine is of a different family? It doesn't share bore or stroke with the EX, LX, DX, CX or Si. The HX has a 2mm larger bore than the EX and a 4mm shorter stroke. The HX has a stock CR of 10.6:1.
It has a much taller final drive, and I assume that the ECU must be programmed for fuel economy, as it gets much better mileage than the other civic models. Perhaps this is also why it gives up 12HP to the EX. Hopefully it doesn't have a real tall 3rd and 4th.[/B]
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