Incorrect calculation! | Posts 16+

Hi,

Your invoice is still incorrect!

The peak power (85 KW at, e.g., 4000 RPM) and torque (285 at 1900) values are completely unrelated! Your correction value of 0.157 is therefore incorrect.

You need to take the performance at 1900 RPM, 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 - but it might be different for your car. And with the performance, you can then calculate the torque at 1900 RPM.

Best regards,

Jan

Hi zusammen

The correct formula is (described in a popular way):

kW = (Nm x rpm) / 9549


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

All ambiguities cleared??

Hi!

Sorry, I mixed up * and /...

Best regards, Uwe