So I am Googling around trying to figure out how one would go about taking this measurement. I have learned the 'book way' of calculating the power generated by the engine/transmission system of a vehicle; but how does one go about physically measuring it? I am learning about different kinds of sensor/transducers in one of my classes and would like to be able to apply some of that knowledge. Would anyone care to discuss any methods that they have had any experience with? I was thinking that one could use a 'bench roller' of sorts (like when you get your car inspected) and one could measure the velocity of the roller that spins as the dragster's wheel spin. But I am sure there are other/better ways including ways to measure the power in real time as the vehicle is driving. Thoughts?