Somewhere I saw a speadsheet of plane stats which included speeds. I wish I could find it but really that isn't my question.

For example
Sopwith Snipe speed 4.7
Nieuport Ni.17 speed 3.5
Spad XIII speed 6.0
etc...

I have two questions. First does anyone know what these number represented? Are they cm on the card?

Next, does anyone know the speeds for the new Series Four aircraft? I'm guessing the old and new reprints are the same speed; but what about those new one off planes.
Pfalz D.III (note not the D.IIIA)
RAF S.E. 5 (note not the S.E. 5A)
Breguet BR.XIV A2 (note not the B2)

That would really be helpful for me spreadsheet.

Thank you,