You are absolutely right arsaib! 

Just did some surfing, and the running time on the German Pal DVD is listed as 131 minutes. Unfortunately it only has German subtitles. So if you're not familiar with the Russian language there will be some obstacles. But maybe this isn't such a huge problem with a silent film and especially Eisenstein 

Some of the press text goes like this:
"For this version, Russian film scholar Naum Klejman largely reconstrocted Eisenstein's original conception of the film".

I'll try to check it out when I'm back in Erlangen. I'm sure the library in Nuremberg carries the DVD. Otherwise I may be tempted to purchase it. So far the Arte DVD editions of silent films have been first rate (I can especially recommend the complete works of Lotte Reiniger).