I would have thought it would be hard to tell how much power an engine has, by MPH down a 1/4 mile track, unless you do a "power to weight" comparison as well. Surely two cars, both with 300rwkw on the same dyno could have a totally different time, eg, a car weighing 1.4 ton will be much quicker then a car weighing 1.8 ton on the 1/4 mile run. Does that make sense