Answer:
I have the orchestral score in front of me as I write this. First of all, Beethoven was enamored of the metronome invented by Maalzel (who was a friend of his), and used Maalzel metronome markings for all his compositions. The first movement, "Allegro con Brio" (brightly, with vigor) has a M.M. marking of half-note=108. In fact, I have never heard it performed this rapidly. Even half note=92 would be considered very fast today. The second movement, "Andante con Moto" (moving along, with motion) is marked M.M. eighth note=92. Again, while I have heard it performed at this tempo, that would be a very crisp tempo for the movement. Third movement is marked "allegro", and has M. M. marking of half-note=96. Yet again, this is faster than the movement is ever performed (near impossible for the string basses at that tempo), and it is usually performed more on the order of half-note=84. The last movement is marked simply "Allegro", and has a M. M. marking of half-note=84. And that is just about where most modern conductors take it.