NYC to Montreal (~370mi) takes ~8 hours by bus and 11 hours by train, though granted, times at Customs is more variable for the bus than for the train. I'm often surprised at how much the train shakes side to side on the occasions it's going "fast".

Contrast that to the TGV in France, which zooms around at 200mph and covered one of my trips between Paris and Avignon (~430mi) in ~2.75hrs about a decade ago. US train infrastructure feels extremely behind in comparison. Perhaps it's because of a greater emphasis on highway travel.