To dream of a race car is a representation of your working nature and stubbornness. It may further represent how competitive you are and how strongly you feel the urge to win. The race car may also be a symbol for ethnicity and how you view it.
To dream that you are driving a race car is an indication that you live your life in the fast lane. You need to learn to slow down before your fast paced life puts your health at risk.
To dream of racetracks is another representation of your fast paced life. You are always trying to get ahead. Conversely, it may be a metaphor for the way you feel about your life. If you feel you are not making progress, but merely 'going around in circles,' the racetrack dream may be a common occurrence for you.