Mr. Raghu Ram,
You have other options for faster reaching to New Delhi.
Apart from Grand Trunk & TN Express, You also get Duronto (non-stop) (28 hrs), Garib Rath (28 hrs) , Rajdhani (28 hrs).
Which class do you wish to travel in ? All these train details with its Departure timings, time table, route, available classes, days of running and...
more... many more details you will get on this website when you use the select buttion feature on the top of the website. Just select from and to stations and get the details of all the trains running between those two stations. For any specific query thereafter, plz visit again and post the query.