Regional convergence is a key objective of cohesion and balanced development at regional level. The existences of regional imbalances do nothing only delay the achievement this objective, requiring the emergence of viable and appropriate measures of the new European context. This article aims to use the appropriate models based on dispersion method (variance) to identify the dynamics and amplitude differences in the level of regional development in European Union and Romania. The results of this research indicate first that the disparities between development regions in Romania have growth more rapidly in recent years, but the EU integration may have enhanced per-capita income convergence processes. These findings may be able to find new tools to reduce income inequalities in next programming period.