The two youngsters have joined the side on a permanent deal from Medeama Sporting Club.
Tahiru, a striker as well as Essiam a midfielder become the latest Ghanaian players to join the Thomas Partey-owned football club.
The two players are expected to continue with their development at the Spanish third-tier side.
Alcobendas Sport is a Spanish football club based in Alcobendas, in the autonomous community of Madrid.
Founded in 1995 it plays in Tercera División – Group 7, holding home games at Polideportivo Luis Aragonés, which has a capacity of 3,000 spectators.
The club was founded as Soto de la Moraleja, Alcobendas first reached the fourth division in 2006–07, finishing in the fourteenth position.
Changing its name to Soto Alcobendas Club de Fútbol in 2006, the team was again renamed the following year, to Alcobendas Sport, with the intention to cover the entire city.
In 1970, another club in the city was founded, Alcobendas CF. It also competed in the same divisions.