Even before the revolutionary Traction Avant went into series production, Citroën had already thought about a later top-of-the-range engine - not in the form of the six-cylinder engine that appeared in 1938, however, but in the form of a V8 engine developed in-house. Test cars were driven and brochures were printed, but then the project was abruptly halted. To this day, the 22 CV remains one of the greatest mysteries in the brand's history.