Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The CitroÃ«n Activa and Activa 2 were two concept cars produced by the French manufacturer CitroÃ«n as a means to test and to showcase features intended for future use in their production cars. Both were unveiled at the Paris Motor Show in 1988 and 1990 respectively. The name Activa was later used to refer to the production Xantia fitted with Activa suspension. Among the features seen on the Activa models was the electronically controlled hydropneumatic suspension (known as the Hydractive" system) combined with an active anti-roll-bar. This married CitroÃ«n''s famous hydropneumatic suspension system to sophisticated electronics, enabling the handling of the car to automatically adapt to how it was being driven as well as virtually eliminating body roll (one of the main criticisms of CitroÃ«n''s hydropneumatic system was the amount of body roll). The Hydractive system was soon to become available to the public first in CitroÃ«n''s XM model 1989, and Xantia model 1993."