Wrong calculation! | Posts 16+

Hi,

your invoice is still incorrect!

The peak values for power (85 KW at, for example, 4000 RPM) and torque (285 at 1900) are NOT related! Therefore, your corrected value of 0.157 is also incorrect.

You need to take the performance at 1900, and you can find that by taking the point on your graph where the engine is running at 1900 RPM - you'll get an approximate value with a little trial and error. I'm guessing that in 5th gear, it should be around 90 km/h. This may be different for your car. And with the performance, you can then calculate the torque at 1900 RPM.

Best regards,

Jan

Hi everyone,

the correct formula is (described in a colloquial way):

kW = Nm x rpm / 9549.

That means that the 81 kW TDI engine has approximately 190 Nm at 4000 rpm, and it produces approximately 47 kW at 1900 rpm and 235 Nm.

All ambiguities cleared?

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