salaam,
I believe Ahmad Deedat wrote a leaflet/book about Jesus' crucifxion in The Bible, called "crucifiction or crucifixion?". You can likely read it online.
From my Quran studies in terms of what is most likely, it seems that it appeared to them that Jesus had died on the cross, but likely became unconcious/fainted. He then probably lived a period after before dying.
Not only does the above fit with The Quran, but also explains The Biblical/Christian interpretation of him being raised alive, and its associated myths.
Links available upon request.