In the USA they all had the same HP and torque ratings between the models. The only difference was where the info was from. Honda states the HP for the 1800 as 102. This was just the engine on a bench dyno with no drivetrain attached. The real world, at the rear wheel HP rating is around 87ft/lbs with the losses from the drivetrain and gears
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It turns out that wikipedia provides other technical data.
Winter is coming, but if it gets warmer, I will go to the dynamometer and measure the power of my VTX 1800, personally I only measured the speed and it came out about 130 miles, which is a bit more than Wikipedia says. Thanks and best regards.