As per the listing on benchmarking website, which was first spotted by PriceRaja, the Moto G4 could be powered by an octa-core Qualcomm chipset (presumably Snapdragon 617) coupled with 3GB RAM. It is expected to run on Android 6.0.1 Marshmallow. The listing also confirms the single-core performance of 937 and multi-core performance of 4451.
Unfortunately the listing does not reveal any other details, but the company has been teasing its improved battery life and better camera on its Twitter handle. Hopefully, we will get to know more about this device along with its pricing at launch event only.