Firs torturing a person isnt what it make them speak. There are many example in which the person even die without speaking a word of information. Will that make any sense?
Also killing a woman and children is it acceptable even if the organization or the person who is interrogating is on the right side?
More on Yes there are and there has been such examples worst than this. Specially the Electronic Chair for Torturing the whole body effecting your nerves and brain.
You can read few of the famous historical was of torture here:
http://www.tofm.org/papacy/torture.htm
and yet to say that there was never an example set by Quran to “torture till death”. If you even say the torturing after " Zina" its a symbolic torture with 100 stones to make the person feel that it will hurt in the end and not with huge stones and having 1000 people standing around throwing countless on them.
Regarding Islamic teaching its either simple interrogation or death penalty.