Difference between Augustinianism and Calvinism Is there a difference between Augustinianism and (Five Points) Calvinism as they relate to the doctrine of salvation?

If so, what is the difference?
Augustinianism is not nearly as specific as 5-points, Dordt Calvinism. For instance, I don't know of anyplace where Augustine specifically addresses limited atonement.

The largest difference is that Augustine held to single predestination (God chooses the elect, but does not actively reprobate anyone - he simply "passes over" them), while Calvin held to double predestination (God choose the elect to salvation, and the reprobate to damnation).

update 

Here are some specific quotes of Augustine's, as they relate to some of the points of Calvinism:

Unconditional Election

On The Predestination of the Saints, ch. 11


  Therefore the election obtained what it obtained gratuitously; there
  preceded none of those things which they might first give, and it
  should be given to them again. He saved them for nothing. But to the
  rest who were blinded, as is there plainly declared, it was done in
  recompense.


On The Predestination of the Saints, ch. 16


  Faith, then, as well in its beginning as in its completion, is God’s
  gift; and let no one have any doubt whatever, unless he desires to
  resist the plainest sacred writings, that this gift is given to some,
  while to some it is not given. But why it is not given to all ought
  not to disturb the believer, who believes that from one all have gone
  into a condemnation, which undoubtedly is most righteous; so that even
  if none were delivered therefrom, there would be no just cause for
  finding fault with God.


Irresistable Grace

Enchuridion ch. 25


  Furthermore, who would be so impiously foolish as to say that God
  cannot turn the evil wills of men—as he willeth, when he willeth, and
  where he willeth—toward the good? But, when he acteth, he acteth
  through mercy; when he doth not act, it is through justice. For, "he
  hath mercy on whom he willeth; and whom he willeth, he hardeneth."


On The Predestination of the Saints, Ch. 13


  This grace, therefore, which is hiddenly bestowed in human hearts by
  the Divine gift, is rejected by no hard heart, because it is given for
  the sake of first taking away the hardness of the heart.


Perseverence of the Saints

On The Predestination of the Saints, ch. 33


  For all who are teachable of God come to the Son because they have
  heard and learned from the Father through the Son, who most clearly
  says, “Every one who has heard of the Father, and has learned, cometh
  unto me.” But of such as these none perishes,
  because “of all that the Father hath given Him, He will lose
  none.” Whoever, therefore, is of these does
  not perish at all; nor was any who perishes ever of these.


Single vs. Double Predestination
Look at the quotes under "unconditional election" above. Augustine speaks passively about the non-elect. God witholds the grace of election, but is not actively reprobating. Contrast this with Calvin on reprobation:

Institutes III.xxii.11:


  At last, he concludes that God has mercy on whom he will have mercy,
  and whom he will he hardeneth (Rom. 9:18). You see how he refers both
  to the mere pleasure of God. Therefore, if we cannot assign any reason
  for his bestowing mercy on his people, but just that it so pleases
  him, neither can we have any reason for his reprobating others but his
  will.