I've tried to read it through with google translate and from what I've gathered they're using their own second gen engine with this. While with these specs the engine looks to be somewhat subpar when compared with alternatives it's still a huge accomplishment to use ones own engine with such products.
ATMACA still uses a modified French TR40, so even with better specs I'd still prefer their missile because I would get all the control I need for production and export (which is a huge deal with naval missiles IMO).
We're still waiting on the KALE 3500 which will propel ATMACA to be one of the best options in the world for it's class as it won't be prone to sanctions nor sale permissions from any western nation while still measuring up with the HARPOON.