There's no definitive answer to the question as originally posed. Heck, a lot of folks can't agree on what a musclecar is or what "powerful" means. Some of the cars provided to the magazines were tweaked & optimized as well, and then beaten as hard as possible by the testers. So, what car, and when it was tested, and the conditions at that time, could skew the results. Heck, I've owned a bunch of stock 383 Road Runners, and some were markedly stronger than others.
