I was talking to a Jewish friend of mine, topic came to whether the Torah the Jews have now is the one actually sent to Moses. She said that the Rabbis told her that the Torah they have right now is indeed the original Torah. I said that would be impossible; if nothing else, Allah would not send the Qur'an while the original Torah is still around. Of course what I said is hypothesis. I have also quoted the Qur'an:
Do you (faithful believers) desire the unbelievers to believe in your religion. There was a group among them (Jewish rabbis) who would hear the word of God [Torah] and understand it. Then they would purposely misinterpret it. —Qur'an 2:75
Some Jews take certain words out of context and by twisting their tongues to make a jest out of the true religion, say, "We heard and (in our hearts ) disobeyed. (Muhammad) ra`ina (be kind to us) but they intend thereby (the meaning in their own language): "Listen! May God turn you deaf." They should have said, "We heard and obeyed. (Muhammad) listen and consider our question." This would have been better for them and more righteous. God has condemned them for their disbelief, thus, no one, except a few among them, will have faith. —Qur'an 4:46
O Messenger! Do not be grieved about the people who run back to disbelief. They only say that they believe but, in fact, they have no faith in their hearts. Some Jews knowingly listen to lies and accept the lies which come from others, [Jews], who have no relation with you and who distort certain words of the Bible and say to the people, "Accept only those words which are the same as what We have told you. If you do not, then beware!" You can not help those whom God wants to try. God does not want to cleanse the hearts of such people. They lead a disgraceful life in this world and in the life hereafter they will suffer a great torment. —Qur'an 5:41
And [mention, O Muhammad], when Moses said to his people, "O my people, why do you harm me while you certainly know that I am the messenger of Allah to you?" And when they deviated, Allah caused their hearts to deviate. And Allah does not guide the defiantly disobedient people. • And [mention] when Jesus, the son of Mary, said, "O children of Israel, indeed I am the messenger of Allah to you confirming what came before me of the Torah and bringing good tidings of a messenger to come after me, whose name is Ahmad." But when he came to them with clear evidences, they said, "This is obvious magic." —Qur'an 61:6-7
It is He who has sent His Messenger with guidance and the true religion to make it prevail over all other religions. God is a sufficient witness to this truth. —Qur'an 48:28
And whoever seeks a religion other than Islam, it will never be accepted of him, and in the Hereafter he will be one of the losers. Qur'an —3:85
And also few hadith:
By Him in Whose hand is the life of Muhammad, he who amongst the community of Jews or Christians hears about me, but does not affirm his belief in that with which I have been sent and dies in this state (of disbelief), he shall be but one of the denizens of Hell-Fire. Sunnah.com
Ibn Abbas said, "Why do you ask the people of the scripture about anything while your Book (Qur'an) which has been revealed to Allah's Messenger is newer and the latest? You read it pure, undistorted and unchanged, and Allah has told you that the people of the scripture (Jews and Christians) changed their scripture and distorted it, and wrote the scripture with their own hands and said, "It is from Allah," to sell it for a little gain. Does not the knowledge which has come to you prevent you from asking them about anything? No, by Allah, we have never seen any man from them asking you regarding what has been revealed to you!" Sunnah.com
However, the portions I quoted from the Qur'an do not unequivocally assert that the original Torah does not exist, not does it assert that the Jews must become Muslims.
Are there other ayath in the Qur'an that would shed light on this matter?