Well, we haven't seen much of his speed when he was alive but when he was Edo, I would of rate it 4 . 5 because it's not anime, we can't see how fast he is and manga is just a bunch of pictures.
we don't even know how fast Naruto was going when he attacked Madara and all he did was put up his Gunbai so who knows i'd say he's faster then Tsunade but slower then A
No significant speed feats. Him defending against bm naruto is more so a sign of his reflexes coupled with the aid of his sharingan.... If I were to take a wild guess at what I imagine his speed to be, it would be 4.5 ish