RENFE Avant isn't older rolling stock IIRC. It's just a cheaper version of the RENFE AVE equipment. The idea is that the higher speed trains are more expensiv

RENFE Avant isn't older rolling stock IIRC. It's just a cheaper version of the RENFE AVE equipment. The idea is that the higher speed trains are more expensive to run and that they take a while to accelerate / decelerate. On a 70 km route the time saved by running a full-on tilting 300 kph train set is probably insignificant and not worth the cost. SF to San Jose is a similar idea. No sense in having Caltrain run HSR train sets.