Hello aspirant,
The top engg. Colleges in Tamil Nadu are:

• Government college of engineering
• IITM
• NIT
• Adhiyamaan college of engineering
• AVS engineering college
• Anna University,Chennai
• AUBIT
• VIT
• You can go through the official websites of the colleges to know more about the colleges.

Hello aspirant,
I am here for helping you.
as per your doubt I am providing you a link below where you can see the list of top colleges in Tamil Nadu.
Link is given below:
https://engineering.careers360.com/colleges/ranking/2018/top-engineering-colleges-in-tamil-nadu....
College list in the above link is on the basis of 2018 record and by clicking on a particular college you can see about rating, ranking, recommendation , etc of that particular college . You can also see feedbacks given by people of that college and about admission process also.
I hope it will help you ...............
For more queries you can upvote me and can ask in the comment box..............
Best of luck...............

Hello Banukumaran,
The top 50 colleges in TAMILNADU are mentioned below.
The order of the colleges are as per priority and ratings given to them by the people who have been there.
1.COLLEGE OF ENGG,GUINDY.
2.P.S.G COLLEGE OF TECHNOLOGY,COIMBATORE.
3.MADRAS INSTITUTE OF TECHNOLOGY,CHENNAI.
4.COIMBATORE INSTITUTE OF TECHNOLOGY,COIMBATORE.
5.SRI SIVASUBRAMANIYA NADAR COLLEGE OF ENGINEERING.
6.GOVERNMENT COLLEGE OF TECHNOLOGY,COIMBATORE.
7.THIAGARAJAR COLLEGE OF ENGINEERING.
8.A.C.COLLEGE KF TECHNOLOGY.
9.KUMARAGURU COLLEGE OF TECHNOLOGY.
10.CENTRAL ELECTROCHEMICAL RESEARCH INSTITUTE.
To know further colleges you can visit the following link.

http://www.annauniversitycounselling.com/info/top-50-engineering-colleges-in-tamilnadu-2015/