If you compare similar widely sold cars across decades prices are fairly level in constant dollars in the US, at least in the low to maybe mid range. For example when I was buying a new car a little under a year ago I looked at 2025 models of some of my earlier cars.

A 2025 Nissan Sentra was pretty similar in constant dollars to my 1982 Datsun Sentra. A 2025 Honda Civic was pretty close to my 1989 Civic. A 2025 Honda CR-V was pretty close to my 2006 CR-V.

The average new car price now is quite a bit higher in constant dollars than the average new car price decades ago, but that is because preferences have shifted to cars that are at more expensive places in the lineup.

My 2006 CR-V for example was more than my 1989 Civic in constant dollars, but CR-Vs are at a higher price point that Civics. If I had gotten another Civic in 2006 it would have been about the same as my 1989 Civic.