2005: First-generation Citroën C1 introduced sharing platform with Peugeot 107 and Toyota Aygo. 1.0 VTi three-cylinder engine produces 68 hp establishing foundation for future racing formula.
2006: C1 production continues with city car establishing reputation for reliability and fuel efficiency. Low purchase costs and minimal running expenses make platform attractive for budget motorsport applications.
2007: Mid-production refinements improve build quality. Growing used car availability creates opportunity for affordable racing formula utilizing depreciated vehicles.
2008: Fourth year of production sees C1 achieving strong sales throughout Europe. Motorsport organizers begin recognizing platform's potential for low-cost endurance racing specifications.
2009: Continued production with minor updates. Used car market matures providing abundant supply of affordable base vehicles for potential conversion to racing specification.
2010: Platform approaches mid-lifecycle with established mechanical reliability record. First discussions regarding potential one-make racing series utilizing production-based C1 specifications.
2011: Late first-generation production phase. Technical feasibility studies confirm C1 suitability for endurance racing formula with minimal modifications required for competition preparation.
2012: Penultimate first-generation year with final refinements. Used car values stabilize at affordable levels supporting economic case for racing series development.
2013: Final first-generation production year before second-generation replacement. Growing stockpile of used vehicles creates ideal conditions for one-make racing series launch.
2014: First-generation C1 production concludes. Abundant used car supply and proven mechanical durability enable launch of C1 Racing series in subsequent years utilizing 2005-2014 specification vehicles.