A rotary internal combustion motor has a stator that houses a compartment defined by two opposite planar surfaces and by an annular surface with elliptical profile, inside which a rotor rotates, which includes a cylindrical drum surrounded by an annular chamber, which is divided into multiple portions by a regularly spaced set of radial blades that are slidingly housed in the cylindrical drum. The motor also has at least one pair of inlet openings, at least one pair of outlet openings, at least one pair of injectors, at least one pair of spark plugs, and at least one pair of pre-heating spark plugs.