"Road Race" and "Stock Car" are two pinball machines produced by Gottlieb in the 1960s, both themed around auto racing. "Road Race" is the replay version, while "Stock Car" is the add-a-ball version, which was a popular feature in regions where awarding replays was not allowed. These machines are characterized by their vibrant racing-themed artwork and straightforward gameplay that emphasizes skill shots, making them favorites among both casual players and collectors.