p51c was faster climbed better flew further than p51d but had less visibility and guns than the d.
seems like it would be an interesting addition for mustang dweebs. i bet they would actually use it too.
http://www-rcf.usc.edu/~nagle/P51perf.htmlMaximum Speed
________ P-51A1__ P-51B2 _P-51C 3_P-51D4
At _5000ft 340 MPH 388 MPH 395 MPH 395 MPH
At 10000ft 360 MPH 406 MPH 417 MPH 416 MPH
At 20000ft 390 MPH 427 MPH 426 MPH 424 MPH
At 25000ft N/A____ 430 MPH 439 MPH 437 MPH
At 30000ft N/A ____440 MPH 435 MPH N/A
Time-to-Altitude Performance
____________P-51A _____P-51B _____P-51C ____P-51D___
Time to 5000ft 2.2 minutes 1.8 minutes 1.6 minutes 1.7 minutes
Time to 10000ft 4.4 minutes 3.6 minutes 3.1 minutes 3.3 minutes
Time to 20000ft 9.1 minutes 7.0 minutes 6.9 minutes 7.3 minutes