[11] In late 1982, the state government approved an extension to the Z class order, the result being 28 A1-class which were built between 1983 and 1985.

[5][1] They were substantially based upon the Z-class design, with improved ventilation, and differing door positions.

However, placing all the Z3-class equipment under the frame posed a problem due to the differing door arrangement, as there were two step-wells where previously there was one, reducing the available space.

Due to a desire to be less pointy and possess a flatter front, they were made shorter with less overhang, giving them a different appearance to the Z-class trams.

[5][2][13] Many initially carried promotional advertising which indicated that the Commonwealth Government contributed towards their construction through the BiCentennial program.

They were very similar to the A1 class, however they differ in being fitted with superior Hanning & Kahl brakes,[15] and a more reliable door mechanism.

[5][2][8] For use on the light-rail lines, A2 296 was fitted with high-beam headlights (similar to the B2-class) whilst retaining its A1/B1/A2 fibreglass apron.

Although trolley poles on the converted A1-class proved useful when pantographs became damaged in service, they were later removed by Yarra Trams.