As you are asking for the Nit Allahabad and Nit Rourkela which is batter according to me both are good Institutes

Motilal Nehru National Institute of Technology:-

Motilal Nehru National Institute of Technology Allahabad (MNNIT or NIT Allahabad), previously Motilal Nehru Regional Engineering College (MNREC), is a public higher education institute situated in Allahabad, Uttar Pradesh, India.

It is one of the National Institutes of Technology, and like the rest of them, confidential as an Institute of National Importance.

In a review carried out by ET Now-Economic Times jointly, MNNIT Allahabad was affirmed as the best engineering institution of North India and ranked No.1 in overall ranking.

Rankings:-

MNNIT has been ranked as the 28th best Engineering College of India in the Edu-Rand Rankings of 2015.

The survey was done together by Edu, an Indian company and Rand Corporation, a non-profit American thinktank

National Institute of Technology Rourkela:-

National Institute of Technology Rourkela ,previously Regional Engineering College Rourkela (REC Rourkela), is a openly funded institute of higher learning for engineering and technology situated in the steel city of Rourkela, Odisha, India.

It is one of the 31 National Institutes of Technology in India and has been recognized as an Institute of National significance by the National Institutes of Technology Act, 2007.

Rankings

NIT Rourkela has been ranked as the 21st best Engineering College of India in the Edu-Rand Rankings of 2015.

The investigation was done together by Edu, an Indian company and Rand Corporation, a non-profit American think-tank.