Rodinal will introduce grain compared to standard development in D-76. I use a lot of Rodinal as well as a fair amount of D-76. There are ways to reduce the amount of grain you will get by developing in Rodinal but it will still be there to some extent. Personally I usually don't mind grain so I use a bunch of the "salt and pepper", but if I need to print big, and don't want grain, I stay away from Rodinal.
Originally Posted by noacronym