^^
The two links are not related to each other, except for the fact that they try to answer your questions & doubts . Since you had mentioned Mr. Tyagi's comments on a passenger jet, it reminded my of a book mark that I had on his plans for a passenger jet when he was the chairman and shared it with you.
Even in the link that you just shared as latest, Tyagi is probably referring to the same project in the Hindu story when he says preliminary studies have already been done.
The reason I shared the second link was to answer your question if it was RTA 70. The business standard link clearly mentions that it is NOT RTA 70 and that the RTA project has been scrapped due to funding issues.
The recent statement from Mr. Tyagi is a mere RECOMMENDATION / SUGGESTION to the students in the university where he received his Hon doctorate and / or current HAL chairman and/or the govt. I do not think it can be taken as an update. The last reliable and official update was that HAL is looking for a foreign partner as mentioned in my second link.
Regarding Ilushin's offer, I do not think this is in any way related to HAL's original plans. As per original plan, they are trying to design and build a 70 seater passenger jet, with some foreign collaboration. Whereas, this new offer is a proposal by Russia to set up a production line in India for their 52 seater.
http://www.ruaviation.com/news/2016/8/23/6594/?h I will wait and watch if this is what HAL would use as its foreign partner for their indigenous passenger jet.