Allrighty. I've got a few questions about exactly which variants/models/series we have and some of their specifications.
A6M5B: Which Sakae engine does our version have? The 1,020 HP 21 or the 1,130 HP 31?
B-26B: R-2800-5, -41, or -43? I've seen all three engine choices listed as having been used in the Marauder.
Macchi twins: Is our 202 using the DB601n? What version of the DB605 is in the c.205? I have a 1,350 HP rating for the 605 in the c.205, but no version #.
FW 190A-8/F-8: Coupla possibilities here. Most likely the BMW 801D-2 at 1,730 Take Off HP. Correct?
Hurricane: Are both of our planes using the Merlin XX with 1,280 HP?
Lavochkin: Both with ASh-82FN rated at 1,850? Doesn't seem right to me.
Mosquito: Merlin XXI's at 1,250 or XXV's at 1,650?
P-47D-25: Stronger R-2800-59 with 2,535 HP as in the -30? Or the same -63 that's in the -11?
Mustang B: I'm assuming that we have the later V-1650-7 engine which is also used in the D model. I've seen alot of range for the HP rating tho. 1,590 T.O.?
Spit 9: What's the full designation of our model? MkIXb or MkIXe? I'm assuming that we have a L.F. version. So we most likely have the Merlin 66 rated at 1,650 HP.
Tempest: Our Tempest is visually a Mk V Serie II, which should mean a Napier Sabre II. Coupla varients of that motor, but the only HP rating I can find is 2,180. That's for the Sabre IIa which should be the same motor as in the Typhoon. Sound rite? I've run across a few refrences that list the cannon in the Mk V Serie as having 200rpg. Has this been whined about before?
Yaks: The -9T has the 105PF-3 at 1,240 HP and the -9U has the VK-107A at 1,650? Da? I don't have any Yak specific books and the web info is pretty sparse.

FWIW, I'm working on some performance/data pages that are more in-depth than what HTC has provided. Anyone who remembers Hoof's WB pages should know what I have in mind.
D