Hello Nandu,

Weather percentile of 81.8 in mains you might get the following colleges:

• MIT Academy of Engineering,Alandi, Pune
• Thakur College of Engineering and Technology, Kandivali, Mumbai
• Deenbandhu Chhotu Ram University of science and technology , murthal district sonepat
• St. Francis Institute of Technology,Borivali, Mumbai
• Manjara Charitable Trust's Rajiv Gandhi Institute of Technology, Mumbai
• Vidyalankar Institute of Technology,Wadala, Mumbai
• Sinhgad College of Engineering, Vadgaon (BK), Pune
• MIT Academy of Engineering,Alandi, Pune
• Xavier Institute Of Engineering C/O Xavier Technical Institute,Mahim,Mumbai
• K J Somaiya Institute of Engineering and Information Technology, Sion, Mumbai

To find out more colleges based on category and JEE mains performance we can visit the following link:

https://engineering.careers360.com/jee-main-college-predictor

All the best

hello aspirant,

 at this rank to get top twenty colleges is not possible. however you have not mention in which state you want to study engineering.  you may use career 360 college predictor to know about your predictable colleges.

Jee main college predictor

Https://engineering.careers360.com/jee-main-college-predictor