generations of the impala i have always thought of a generation of a car to mean specific body styles of a car when a car's body style changes it is a new generation sorry if that sounds convulted but anyhow the infoboxes stating the generations of the impala may be wrong and it may be worth checking out for the record here's how i understand the generations of the impala first second third fourth fifth sixth seventh eighth ninth th th and th someone may want to look into this