How much did a car cost in 1921?
Oddly enough, while the price of almost everything goes up over the decades, the price of cars falls dramatically. For example, the Ford Model T cost $1200 in 1909. Five years later, it cost $490 (or about $11,000 in today’s money). By 1921, the same car was $310, or roughly $4,000 in today’s money.
The Model-T (the first cheap car) cost $850 in 1908. When you adjust for inflation, that is about $22000 now.