The chap sitting beside the driver might be SA Governor Sir Henry Galway...seen in this SLSA pic - collections.slsa.sa.gov.au/resource/PRG+280/1/14/1
I'm fairly certain the chap sitting in the back on the left (viewer's right) is Victorian Governor Sir Arthur Stanley - www.npg.org.uk/collections/search/portrait/mw52597/
The chap sitting in the back on the right (viewer's left) might be NSW Governor Sir Gerald Strickland...he wore specs...
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Is the car a Renault ? From the shape of the bonnet ...
Indeed it is a Renault: 1914 12CV EF Torpedo Chassis