The 12085/ 86 Naharlagun–Guwahati Shatabdi Express presently has 6 AC Chair Car and 2 End-on Generator coaches.

As is customary with most train services in India, coach composition may be amended at the discretion of Indian Railways depending on demand.

The 12087 / 12088 Naharlagun–Guwahati Shatabdi Express covers the distance of 332 kilometres in 06 hours 00 mins in both directions.

The 12087 / 88 Naharlagun–Guwahati Shatabdi Express runs from Naharlagun via Viswanath Charali, Rangiya Junction to Guwahati.

Being a Shatabdi-class train, it returns to its originating station Naharlagun on next day and also it shares rakes with 12085/86 Guwahati–Dibrugarh Shatabdi Express