A lot of ww2 aircraft have very recognizable sounds, though.

Rotary engines have a distinctive sound, where the pitch is affected by the amount of cylinders... so if you know how many cylinders your favorite early bomber has, you can probably tell it apart from the others. Usually an odd number for some mechanical reason I never quite understood, so there aren't that many to choose from.

Ju87 (aka stuka) had the siren mounted on the lead aircraft and when you think of that sound a plane makes in a steep dive, that's why

Not that many aircraft used a V12 engine, so if you guess that it's a spitfire or P51 mustang because it sounds like an F1 car, chances that you are wrong are small. Well, the bf109 does, but nobody likes that aircraft for its sound.