When introduced, the train consisted of new carriages built by the Midland Railway Workshops.
In August 1985, Westrail awarded Comeng, Bassendean a contract for five Westrail ADP/ADQ class railcars, three ADPs with driving cabs and two ADQs, using a similar body shell and interior fitout to the New South Wales XPT carriages.
Each carriage was powered by a Cummins KTA19 coupled to a Voith transmission.
They usually operate as a three or four carriage set.
Five carriage set operation is not possible due to the limited platform length available at Perth station.

In July 2003, the DMUs were painted in a new livery in line with the formation of Transwa.
In 2007, the DMUs were painted white as part of a refurbishment program.
In 2010/11, new seats were fitted.
Six new Alstom built railcars are scheduled to be delivered in 2022.
When introduced, the train consisted of new carriages built by the Midland Railway Workshops. In August 1985, Westrail awarded Comeng, Bassendean a contract for five Westrail ADP/ADQ class railcars, three ADPs with driving cabs and two ADQs, using a similar body shell and interior fitout to the New South Wales XPT carriages. Each carriage was powered by a Cummins KTA19 coupled to a Voith transmission. They usually operate as a three or four carriage set. Five carriage set operation is not possible due to the limited platform length available at Perth station.
In July 2003, the DMUs were painted in a new livery in line with the formation of Transwa. In 2007, the DMUs were painted white as part of a refurbishment program. In 2010/11, new seats were fitted. Six new Alstom built railcars are scheduled to be delivered in 2022.
Australind (train service)