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Hybrid vehicles have been developed for improving efficiency and the consequent reduction of fossil fuels consumption in the transportation sector. The complexity of such vehicles allows for countless architectures, being one of them the range extender concept, which corresponds to an electrically powered vehicle equipped with a small combustion engine to improve the vehicle range. In the literature there is no current consensus whether range extenders should adopt simple engine technology aiming at cost reduction, or should they incorporate complex systems in order to achieve a remarkable thermal efficiency and low emissions. In the context of exploring the advanced options for range extenders, the combustion characterization is a fundamental step, which provides information on combustion behavior for several fuel types under a wide range of combustion modes. That information can both yield useful insights for engine development and provide combustion datasets for engine simulation.