Quote:
Originally Posted by 300hp
I think the sport graphs are just as good at being indicative as the mpg graphs.
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MPG is easy to calculate as there are only two values, both easily obtained as actual measurements.
Calculating horsepower and torque is going to be, at best, an estimate based on a large number of variables none of which are measurements of power. For example, throttle position is only that - it only indirectly indicates the power which may be produced.
Then there is the variability of mass produced engines. Having seen many "identical" cars on the same dyno produce significantly different results (but consistent with the same car), I know there is no generic engine parameter we can measure to accurately predict a given engine's power.
The sport displays can reasonable be expected to read within plus or minus 10%, but I am afraid this is about as good as they can get.