The Bible is the Word of God.
If the Bible is the Word of God, the Quran is not the Word of God, because the Quran contradicts many fundamental concepts found throughout the Bible.
If the Bible is NOT the Word of God, the Quran is not the Word of God, because the Quran claims that the original words of the Bible came from Heaven (Quran 2:87, 136; 3:3; 4:163; 5:46), and that words from Heaven cannot be altered or corrupted (Quran 6:34; 6:115; 10:64). Therefore, if the Bible did not originate with God, or has allegedly become corrupted, the Quran’s claims about the Bible’s words coming from Heaven were also false, making the Quran a false book.
Conclusion: No matter what, the Quran is not the Word of God!