I think it is 2 litre block based on its height. Number on the block is also same as 130tc abarth. I did not find any comment about bore size but it seems to be 84mm (picture from the head shows the carbon deposits in combustion chamber). Pistons look standard 130tc and with them CR can not be much more than 9,5. Valve sizes cant be right in the advert, definitely too small. Head can be swappep from another model even if the camboxes are still from 130tc.
Ports looks big but with advertised valvesizes and low compression I dont think that 190 hp from that engine (if all pictures are from the same engine) is possible

They've edited the text, added details about the cars and deleted the bit that said the pistons were 81mm. Everything looks wrong about it, and to get 190bhp out of that motor as it is is dreaming.