In their original appearance, cleverly and indicatively called The Time Warrior, the Sontarans are perfectly capable of nabbing people from 1980 and dragging them back to the 13th century with a damaged spaceship.
And yet they don't seem to have that technology any other time we see them, even going so far as to make a deal with Dastari and, er, Servalan to try and gain time travel technology in the Two Doctors. So either they had it and lost it (confiscated by the Time Lords themselves perhaps?) or else Linx is a Sontaran from the far future.