Depends.. I'd say Spit 9 wins or it is a draw. The D9s only option is a lazy bore n zoom type offense, or to run away. If the D9 commits hard, it is only a matter of seconds before the Spit 9 would have the advantage.. and if the D9 commits hard.. it can't get away because the Spit 9 accelerates better. If it doesn't commit hard, the Spit can evade its lazy bore n zoom passes, while building up energy faster than the D9 can. Eventually, the spit will be able to chase the D9 up and hose it while the D9 is hung over at the top of its Immelman.
Unless the D9 goes for the treemendously boring approach of "extending" straight for a sector before beginning a gentle climb to get above the Spit. And even then they'd be up past 20k, where the D9 starts losing steam, and the Spit 9 starts coming into its own as a energy fighter.
The 190 (all of them) is a spectacularly crappy 1v1 plane. Turn rate and radius are both awe-inspiringly poor, climb rate and zoom are unimpressive, and acceleration is mediocre (except in a dive). Low speed handling varies from poor in the A5 to downright awful in the D9/A8. The A5/A8 have relatively slow top speeds (compared to the 1945 speed demons) and good guns, while the D9 has average guns and decent top speed.
The Spit 9 on the other hand, is a great 1v1 plane. It has my money for the best 1v1 plane in the game. Turn rate and radius are both great, if not outstanding. Climb rate and acceleration are great, low speed handling is superb, acceleration is phenomenal, especially when diving. Firepower is superb, there is no single gun better than the Hispano, in Aces High.
Whereas a bunch of 190s would probably fare pretty well against a bunch of Spitfires, I don't think 1 190 against 1 Spitfire would even be close.
