A piston for an internal combustion engine, comprising: a piston body forming a crown portion and a skirt portion, the skirt portion including a bore that is arranged to receive a pin for connecting the piston to a connecting rod, the crown portion forming a bowl surrounded by a flat crown surface having an annular shape and disposed along a plane, the bowl and the flat crown surface meeting along a circular edge surrounding a rim of the bowl; and an airfoil surface formed in the flat crown surface, - the airfoil surface having a concave shape and extending annularly around the rim of the bowl, - the airfoil surface including an expanding surface that extends radially outwardly with respect to the piston and sinks away from a plane that contains the flat surface, - the airfoil surface further including a converging surface disposed radially outwardly with respect to the expanding surface and rising towards the plane that contains the flat surface, - the airfoil surface further including an inflection surface disposed between the expanding and converging surfaces to form a bottom trough of the airfoil surface - wherein a radius of curvature of the expanding surface is larger than a radius of curvature of the converging surface and the airfoil surface creates an airfoil effect that redirects moving fluids entering the airfoil surface upwards and away from the piston, the radius of curvature of the expanding surface having a nominal dimension of 47.3 mm and the radius of curvature of the converging surface having a nominal dimension of 2.6 mm, an overall width of the airfoil surface in the radial direction having a nominal dimension of 13.9 mm. a piston body forming a crown portion and a skirt portion, the skirt portion including a bore that is arranged to receive a pin for connecting the piston to a connecting rod, the crown portion forming a bowl surrounded by a flat crown surface having an annular shape and disposed along a plane, the bowl and the flat crown surface meeting along a circular edge surrounding a rim of the bowl; and an airfoil surface formed in the flat crown surface, - the airfoil surface having a concave shape and extending annularly around the rim of the bowl, - the airfoil surface including an expanding surface that extends radially outwardly with respect to the piston and sinks away from a plane that contains the flat surface, - the airfoil surface further including a converging surface disposed radially outwardly with respect to the expanding surface and rising towards the plane that contains the flat surface, - the airfoil surface further including an inflection surface disposed between the expanding and converging surfaces to form a bottom trough of the airfoil surface - wherein a radius of curvature of the expanding surface is larger than a radius of curvature of the converging surface and the airfoil surface creates an airfoil effect that redirects moving fluids entering the airfoil surface upwards and away from the piston, the radius of curvature of the expanding surface having a nominal dimension of 47.3 mm and the radius of curvature of the converging surface having a nominal dimension of 2.6 mm, an overall width of the airfoil surface in the radial direction having a nominal dimension of 13.9 mm. - the airfoil surface having a concave shape and extending annularly around the rim of the bowl, - the airfoil surface including an expanding surface that extends radially outwardly with respect to the piston and sinks away from a plane that contains the flat surface, - the airfoil surface further including a converging surface disposed radially outwardly with respect to the expanding surface and rising towards the plane that contains the flat surface, - the airfoil surface further including an inflection surface disposed between the expanding and converging surfaces to form a bottom trough of the airfoil surface - wherein a radius of curvature of the expanding surface is larger than a radius of curvature of the converging surface and the airfoil surface creates an airfoil effect that redirects moving fluids entering the airfoil surface upwards and away from the piston, the radius of curvature of the expanding surface having a nominal dimension of 47.3 mm and the radius of curvature of the converging surface having a nominal dimension of 2.6 mm, an overall width of the airfoil surface in the radial direction having a nominal dimension of 13.9 mm.