[tecleandor]

Seems like the train set is around 30 feet longer and has more (maybe shorter) cars than the Acela express.

It'd be nice to see the distribution to know if there are some other efficiencies with relation to total length (shorter power cars) or internally (better seat distribution, maybe less first class...). Haven't looked much around, so maybe it's easy to get that info.

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  https://en.wikipedia.org/wiki/Avelia_Liberty
  https://en.wikipedia.org/wiki/Acela_Express_(trainset)