Abstract: A rotary internal combustion engine is provided, comprising one or more modules mounted on a common shaft, each module comprising a rotor, a stator, an ignition system, a working chamber, an exhaust gas discharge system, and a system of seals. The engine is characterized in that the working chamber, together with the fuel mixture mixer, inlet port and the ignition system, are disposed externally of the stator, and oriented tangentially to said stator the stator being of a cylindrical type, with its axle somewhat offset from the rotor axle, the rotor also comprising a working vane and a suction vane serving both as a working means and a seal; each engine module also including a maintenance manhole with a seal and an exhaust port.