Am I misreading/mis comparing various stats?Don’t forget standing room. On a 756 there is additional capacity for 148 standees on a 3-car and 204 on a 4-car unit to bring total capacity to 290 and 394 passengers respectively. I assume that the 755 for GA will have a similar total capacity too.
If these new trains are to be replacing the 15X fleet and also substitute for the 195s operating through Manchester & Leeds, then we need to understand for a FLIRT could compare to a 15X in 4xcar formation (as that is the predominant configuration) and compared to a 4-car and 6-car 195 formation.
A 4-car 150 would be 80m long with just over 400 passengers, while a 4-car 156 or 158 would be 90m with a capacity in the region of 440-450.
So if all 15X units are replaced by the same volume of 75X units in a combination of 3-car and 4-car trains, it would therefore be possible to continue running double units just as the 15X and 195s are today. That would mean trains of 130m or 160m long in 6-car or 8-car formation, with a total capacity of 580 or 788 passengers (seated and standing).
So it could be the case that following in the footsteps of Greater Anglia and TfW and get some 755s or 756s might not be a bad thing for Northern to do. At least to have enough 3-car to run in 6-car formation.
80m = c.300 seats in a GWR 150 v 755/4 202 seats (plus 27 tip ups)
That seems quite a big difference.
And less flexibility for the 755 as you can’t have two 40m trains.
Bigger issue is whether Stadler would set up a factory for such a big framework order (though they would demand a guaranteed minimum presumably).
If not then giving them such a significant big long term order would be politically courageous.