How far is old Mexico from New Mexico?

Answer 1

Mexico won its independence from Spain in 1821, and lost its northern territories, including most New Mexico, in 1848. Therefore, Mexico is 27 years 'older' than New Mexico. Present-day New Mexico shares a common border with the country of Mexico, the place you are referring to as 'Old Mexico'

Answer 2

Both countries are approximately 263 kilometers (163 miles) apart from each other (border to border) with Guatemala in the middle.