Shenny HQ

I don't agree with Penny's everyday car, but Sheldon's is pretty funny.

My picks for the Shelenny would be

Sheldon. No inferior complex. High tech. Dislikes driving, uses autopilot whenever possible:

Tesla Model S

Penny. Californian girl. Showoff. Like to have fun and confidence, even when driving:

Mazda RF

Leonard. Short, low on self-esteem. Hides his inferiority with the big SUV:

Cadillac Escalade