To dream of antique or old fashioned cars represents current decisions in an area of your life being influenced by the past or by nostalgia.
If an old fashioned car is black or red this symbolizes your thoughts and decisions being too influenced by the past, or return to unhealthy habits or views. You need to focus more on what’s happening now and to the future.
Example: A man dreamed of a black antique car in his parking lot. In real life he was thinking about being with an ex-girlfriend whom he had a very unhealthy relationship with.