Drag coefficient given in GTA is regularly 3.2-4.5 for realistic drag coefficient. Top speed: solved(real value in handling divided to 1.32., Engine power is in kilowatts f.e. 442 kw for bmw M5 F90 is 0.442 in handling.
Look at this and let me know what do you think. This is M5 F90 hanling lines.
have so much to discuss, but too sleepy. it's quite late here )
just look at handling file: