Facts: I left the area of Corso Trieste (about 2 km north of termini, for those who don't know Rome) yesterday in my own car at 7:25 and I arrived at FCO at 8:40. I know the way very well and I drive an old, small car (meaning that I wasn't afraid to do a little bit of slalom). Of course, if I had left half our earlier, I am certain that I'd have made it in about 30-40 min.