In this conversation, what is Betsy?

M: Hey, Carla, haven’t seen you for a long time. Look, what’s new?
W: Well, I got a new car.
M:  Really? What happened to old Betsy? Sold it?
W: (9) After 150,000 miles, she finally died.
M: Oh, I’m sorry to hear that.
W: Me, too. It had been my favorite once.
M: So what kind of car did you get?
W: A Toyota. In the beginning I wanted to buy an American car. But you know, recently the oil price has been going up continuously. So I decided to get an economical type.
M: That’s a good little car. Have you ever thought about how cars get their names?
W: Huh-uh, not really.
M: Well think about it. Toyota has a series of different names for its ears. They all start with a "c" and sound Italian, but they don’t mean anything.
W: Just like lots of American cars are named after birds or fast animals, such as "Blue Bird", "Eagle".
M: Car companies must spend a lot of time and money coming up with these names. Speaking of which, what are you going to call your new car?
W: I don’t know yet. Do you have any ideas?