NZR RM class (Thomas Transmission)

It aimed to develop a light and self-contained vehicle that could operate economically even with low passenger levels.

[3] The body of the railcar was built at Petone Workshops in the Hutt Valley; driver's compartments were located at both ends and it could carry fifty passengers.

They also supplied the underframe and bogies, and J. Tylor and Sons of London provided the railcar's 150 kW (200 hp) V8 petrol engine.

This route was also operated by the Westinghouse railcar until 1917, when its repeated failures caused it to be permanently withdrawn from service.

[2] A similar but temporary fate befell the Thomas Transmission railcar; it gave good service for a few months but then had to be mothballed as a critical component of its transmission failed and World War I restricted the ability of NZR to source a replacement.