How long must the average American work to purchase an automobile in 1920?

A typical car’s price during the time averaged at about $1,496.
Let’s take the weekly wage of a factory worker at the time. They were paid about $12/week.
The annual income would be $624. If they worked for two years, they’d have $1,248.
In conclusion, the average factory worker would need to work a little over two years to afford an automobile. Keep in mind that this amount hasn’t accounted for food, tax, rent, etc, an that each wage varies differently.