Just saw the movie myself. Agreed, very good and non-stop.
When I saw the train scene, I was almost sure that it was a Metro-North Genesis (which would make sense since they're supposedly about to make a Hudson crossing, even if it is on the west side of the river) unit in the silver/blue livery, which very much looks like the Surfliner scheme as well. Was too fast for me to be sure, but that was my first instinct.
But, the scene was filmed in Athens NY, Greene county, where they apparently had to build the crossing and tracks for the shoot. This is why it'd make sense for them to shoot the scene without the train and add it in later (hence the Surfliner). Not that they'd be setting any MN trains on fire if they were indeed shooting from the east side...........
edit: I found another article discussing the shooting of this same scene being done in Cold Spring NY, lower Main Street.