When working undercover, Nash used the alias Teddy Malone.
Can't we take a bigger car? Or a bus, perhaps?
Nash Bridges 1971 Plymouth Barracuda "Hemicuda" was at the time and has been the most expensive production vehicle on the classic muscle car market. The vehicle was worth at least $450-700k in the 1990s and is now $2-3 million USD for the 15 known models.
Neither the San Francisco Police Department (nor any police department) would allow its employees to drive such an expensive vehicle for routine police work.