Citroen - Citroen GS Birotor
The Citroen GS Birotor was an experiment, riding on the wave of the hopes of Wankel rotary engine, launched in 1973. Citroen formed a joint venture with NSU in developing the super light, high powered rotary patent in a company to build the engines called Comotor. Much development work took place building some 500 cars to get in use data, before Citroen decided to take the plunge with it commercially. The beauty of the rotary engine was it could be stacked up in series, and the plan was for 2 and 3 rotor assemblies. The Citroen GS Birotor had the twin rotor engine, and the GS model was heavily changed also, resulting in a very expensive list price of FF 28,995, which compared to the basic GS of 16,895, or a top of the range DS 23 Pallas at FF30,300. But fuel economy was not the rotary engines strong suit, and the fuel crisis of 1973/4 did not help matters, as well as issues with NSU who were having complaints of rotor tip degradation (later solved) which would make for an expensive warranty situation. So production was finished in 1975 and Citroen tried to buy back the cars from their customers on generous terms, which most owners took, which is why the GS Bimotor is such a rare car now! Another knock on effect was the proposed 3 rotor engine destined for the new CX model was halted, so the CX ended up with a conventinal engine.
Citroen GS Birotor was originally fitted with tyre size 165R14, and Blockley produces a 165HR14 tyre to suit.
