Lycoming AO-235. Ther 'A' prefix denotes it's an aerobatic version . Not as aerobatic as some of their other engines which have a slightly different prefix (AEO-xxx). It's been a while it might be the AEO prefix that applies to the A152. Can't remember.
About 25 L/hr. A bit more if you're going flat chat, less if you're flying for range.
Vy is about 65 kts (67?) at SL, reducing with altitude.
149 L useable although there's a smaller tank version too with about 90L (I seem to recall).