I searched up the history of Holden and this is what I found. Below is quoted from a brochure and found it interesting!
It didn’t take long for the Holden to become “Australia’s most poplar Car as showed by this press ad, over 120000 48/215’s were sold before production switched to the even more successful FJ. The heart of the matter. The 48/215’s overhead valve straight -six had a capacity of 132.5cubic inches (2171cc) and produced a healthy – for 1948 60hhp (45kW) at 3800rpm. compression ratio was 6.5 to 1.