1.We purchased in 2008 means later than 8 years of neibhour, because of that is there any problem to us?
No. There should not be any problem because of that but you must ensure that you have not encroached his portion of property and are occupying the property as per the measurement mentioned in your sale deed.
2.He did not raised any issue upto 2016, is he having right to fight with us after 8 years of my land registration??
He can raise this issue whenever he finds this problem, but the same shall be barred by limitation after 12 years from the date of the knowledge.
3.His land matching with link docs but till now he did not placed any compound wall or fence along with his land because of that surveyor wrongly measured physical length.
Surveyor cannot measure wrongly, it is your presumption. Surveyors are to give a correct report in this regard, if they do any fraud then they will be held liable for the consequences.
4.My registered land not matching with Link docs but we have clear written agrement with seller on bond papers( revenue stamp papers)with actual measurements, is it helpful to us?
If your measurement is not matching to the link documents then you have to be careful about this.
The sale agreement is not an authority, i can be manipulated due to the greed of money by the vendor hence it is unreliable.
The actual measurement will be available with the land revenue department