Dublin-Cork is approx 160 miles by road: miles not kms. It's 165.5 miles by rail, which is about 265 kms. Given acceleration performance of diesel trains it would be difficult to beat 2hours10 minutes with 3 stops, as opposed to 2.40 at present. However extending the existing 160 max to most of the line and getting rid of some of the really bad slacks through stations could easily chop 10 to 15 minutes off the journey, for a very small fraction of the cost of 200 kph.
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