According to an October report by Market Watch, Americans needed an annual income of at least $100,000 to afford a car, at least if they're following standard budgeting advice, which says you shouldn't spend more than 10 percent of your monthly income on car-related expenses.
This is a dumb way to determine whether someone can "afford" a car.
Monthly payments depend on loan term and interest rates as well as principal. I don't think that is a good way to determine whether you can afford something.
They didn't list out every factor of the standard advice. The standard advice also includes 20% down and no longer than a 48 month payback period. So it more or less locks it in, other than rate.