BobM2
"No P-51 either Allison or Merlin ever had turbocharging"
Jane-DoH
"Really, I was always under the impression that the Merlin version did... if you're right, you learn something new every day"
Bob is right. The Merlin was supercharged, not turbocharged. And no, I'm not going to explain the difference. Go and look it up. Or have a good look at this pic.