Duration of "Giselle"

[afds]

I've just managed to get hold of a ticket for Obraztsova's Giselle at the Teatro dell'Opera in Rome and am very excited. I know the standard duration is 2 hours including an interval (both the Royal Ballet and the Paris Opera versions), but Carla Fracci introduced an "unabridged" version a couple of years ago and I have no idea how much longer it is. The Opera's website has no information, I'm hoping somebody here has seen it/has an idea? It's not an idle question, train schedules are involved...I'd be very grateful for any help. Thank you!