Brazil is 3.1 times larger than Argentina.
Area: 2,780,400 km2 World Factbook
Population: 43,024,374 (July 2014) World Factbook
Argentina, officially the Argentine Republic is a federal republic located in southeastern South America. Wikipedia
Area: 8,514,877 km2 World Factbook
Population: 202,656,788 (July 2014) World Factbook
Brazil, officially the Federative Republic of Brazil, is the largest country in both South America and the Latin American region. It is the world's fifth largest country, both by geographical area and by population. Wikipedia