Earlier quoted context omitted.
> Would it make Madrid - Paris train route competitive? No, not at all. Just to provide some data points: Madrid-Paris by train takes about 17-20 hours and costs between 261 and 350 Euros. By plane, it takes about two and a half hours and costs (in your example) around 170 Euros. Also take into account that for many international travellers, the time saved aspect is more relevant than the money saved aspect, as lifet…
You can find a ticket from Madrid to Paris taking 10.5 hours for 226 EUR.
10.5 hours is still longer than 2.5 (or maybe - if you include security checkpoint time - 3.5 hours) by plane.