Embankments made of soil tend to deflocculate and erode in the presence of water, and this is characterised as soil dispersivity, so the erosion of embankment material should also be considered as one of the essential safety requirements of the embankments. The guidelines about the suitability of geomaterial used for embankments, developed by the highway and railway research board, did not account for the erodability and dispersivity of geomaterial used for embankment construction. Hence, this paper mainly focuses on studying the influence of dispersivity on the erodability of soils. The Pinhole test was conducted to determine the erodability of 15 collected samples. Critical hydraulic shear stress, erosion rate and erosion coefficient of the soils were determined by erosion law, which relates the erosion rate of soils with the excess applied hydraulic stress. These erodability parameters were correlated with fines percentage and soil dispersivity. The results indicated that soils with a higher percentage of fines have a better erosion-resistant character than those with lesser fine content. The dispersivity of soils has a negative effect on soil erosion resistance; soils which have a percentage fines less than 20% are classified as highly dispersive (D2) based on the Pinhole test results and have a very high erosion rate and high erosion coefficient, such soils have a critical hydraulic shear stress of around 3.6 Pa. The tests revealed that an increase in soil dispersivity leads to more turbid water, indicating increased soil loss during erosion.