Although Nash Bridges' car is referred to as a 1971 Plymouth Barracuda (the grille/headlamp, mirrors, and tail light configuration is that of a 1971 Plymouth Barracuda.) The actual cars used were 5 Total, (4) 1970 Plymouth Barracudas and (1) 1973 Coupe (used as FX Car)converted to look like 1971 Hemi Cuda Convertibles. None actually had a Hemi motor, but rather 318-440 motors. 1 stick and 4 automatics.
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.
The San Francisco Police Department (nor any police department) would allow its employees to drive such an expensive vehicle for routine police work.