Originally Posted by Otis

P-51 is the best internal combustion you'll ever hear, short of a 50's Testarossa V-12. Got to hear one once from the tarmac taxi and take off. Still stands the hair up on my neck thinking about it. Also got a chance to look at one of the Packard built Merlin mills taken apart. Absolutely beautiful workmanship. Every internal surface smoothed and polished, not a sharp edge or casting mark left anywhere. And damn near every fastener safty wired. Just a gogeous machine.