Is this the motors on your other post?
They show constant torque at 6.5A?
If you used the numbers you have, you would need a 9KVa transformer!
AC secondary is .707xDC, so you could get away with a common 120V secondary transformer if you wish.
The bridge rectifier needs to be sized for current and something called PIV (peak inverse voltage), or what the bridge voltage is subjected to when the rectifiers are reverse biased.
Bridge rectifiers are cheap so you can oversize without the need to size tightly because of cost.
So you need the I, current value, lets say 50amps and a PIV of, in the case of a bridge, 200~250PIV.
I don't see you requiring anything larger than 1.5Kva for a supply.
You also need 250vdc rated electrolytic capacitor(s).
By my reckoning you would need ~8000µf-12,000µf, for a DC p/p ripple of =or<10vdc.
My suggestion anyway.