V8 R would be a DVD image, not CD. I don't remember V8 R being that big though - I bet the seeder either didn't zip the image or the ripper included subchannel data of some sort to bloat the size.
As a side note, GTS LE, V6 R, and V8 R did not need to be DVDs. Sogna just went that route to try to cut own on pirates. Only RSR benefits from the larger DVD capacity.