The power output is different.......
The Chinese CU2s had less power due to fuel quality
Also wih the cl9's the USDM ha 10kw more than the AUDM/JDM
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Well in China we get a K24A5 which has 190hp I think, compared to the 200hp that the TSX has. The compression ratio is also lower to run on RON93 petrol.
The new 2013 CU2's here have a 2.0 liter engine option which is probably a K20 variant.