What's the 2CV all about? Ultra-cheap transport for the masses. So what was Citroen thinking back in 1973, when it created the 2CV Pop? It daubed it with all sorts of dubious antique styling elements, like a pre-war grille, hood irons and boot-mounted spare wheel. It also ditched the 2CV's 602cc flat-twin engine in favour of a four-cylinder unit taken from the GS. Citroen actually contemplated turning this into a production model before sanity intervened.