Romania is 81% larger than Greece.
Area: 131,957 km2 World Factbook
Population: 10,775,557 (July 2014) World Factbook
Greece, officially the Hellenic Republic and known since ancient times as Hellas, is a country in Southern Europe. According to the 2011 census, Greece's population is around 11 million. Athens is the nation's capital and largest city. Wikipedia
Area: 238,391 km2 World Factbook
Population: 21,729,871 (July 2014) World Factbook
Romania, formerly also spelled Roumania and Rumania, is a country located at the crossroads of Southeastern and Central Europe, on the Lower Danube, north of the Balkan Peninsula and the western shore of the Black Sea. Wikipedia