A German friend, also a driver asked me what i thought the best high speed train we have is in my view? I have to say i like the Azuma best. Fast, good looking, good cabins and a real leap forward from the HSTs i used to drive.
You?
Not an easy question to answer, they all have one or another issue which makes giving a single answer difficult.
HSTs - of all the 125mph capable trains we have it is undoubtedly the most successful. 40 years in frontline 125mph service is quite an achievement, particularly for a diesel train. They lose out on power, compared to most modern trains their top end acceleration is very sluggish and having the traction concentrated at the ends really shows up in poor adhesion compared to say an Azuma.
IC225s - much better acceleration at higher speeds than an HST (80+mph), they can keep sharper point-to-poimt timings, but they never really solved the ride quality issues satisfactorily.
80x - the performance on electric is brilliant can't argue with that, certainly they look modern - shame they are let down by build quality and a ride quality that is variable (it can be worse than a 225 or slightly better but either way it's not a smooth rider, it gets unsettled very easily).
390 - again the performance is good, they've certainly revolutionised the WCML, the ride is quite good the main issue is the cramped interiors and until certain remedial actions were taken the lack of seating capacity vs demand.
I think I would score thus:
HST - 95/100
225 - 90/100
390 - 90/100
80x - 80/100