That engine is a ghost as far as drawings go. I've looked into finding some, but always ran into the 185hp version. Comparing both, I settled with the assumption that the 185hp probably had a higher compression ratio to the 160 but otherwise looked the same as the 185 externally.
Of course, I'd be happy if proven wrong with sufficient documents about the 160 as I am building my Hansa-Brandenburg C.I featuring the same engine.
As for the 185hp AD6, I have a few drawings and, I dare say, excellent pictures I took of one of the few survivors (originally fitted in a Hansa-Brandenburg D.I, KD fighter, also known as the starstrutter or deathtrap
) with serial AD 7139.
I simply gave up looking for the 160 on the web and will leave that for when I visit the Kriegsarchiv in Vienna.
Meanwhile, have a look to
my HB C.I build-thread with some details and drawings of the 160/185hp. There I've labelled it as a 160, though, I am not certain. Again, maybe some pros know more and would be kind enough to share.
Karl