In the late 1930s and into the 40s, gazogène technology offered an alternative to traditional gas and diesel engines. In this system, charcoal or wood is burned, the particles filtered out, and the hydrocarbon gas used for combustion inside the engine.
Our car, a 1929 Ford Model A, received a gazogène system from Spain in 1939. This Ford was running in the island of Palma de Mallorca, in close proximity to Barcelona. It is one of very few survivors, and it still runs great with the charcoal purchased from the local hardware store.