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That is your opinion, and nothing more, you car is faster with a big deviation on speedo show me a proper gps monitor run!
And btw his car never had 300hp, because a 300hp 147 does 100-200 dragy time so not speedo around 12seg and speedo times are 9.9 seg i can show you!
Now it gets interesting... so I was telling fairytales all the time? I went to 5 different dyno stations to check the power of my car, and they were all wrong? :D
 

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Premium Member
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I think comparing movies of the speedo the determine the power is only an indication. I think a more reliable way to compare the power is look at the time difference in a 4th gear datalog. I usually look at the time from 2000-4500 rpm, but also at the times for 500 rpm steps. So 4000-4500 rpm for power and 2500-3500 rpm for torque comparisons. This method proved to be very accurate when I tested different mappings on the road, and compared the predictions with the dyno figures.
 
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