I'm unsure if this has been discussed elsewhere, possibly in Class 700 or Class 707 threads, and if it has I apologise in advance, but this has been on my mind for quite some time.
Given the influx of Aventra orders recently, and with the Class 701 replacing the 707 (still a brand new train), I'm starting to wonder if the Desiro Cities are successful or not.
Thoughts?
It all depends on your definition of failure, plus a lot is down to the specification of the train.
The class 700 is highly unpopular with passengers, but how much of that is down to the DFT's specification? The horrible seats can be blamed on various factors, but something like the floor ducting is a design issue.
Certainly from an order book perspective the Aventra is doing better, and it seems the 707s are turning out to be a white elephant (for now at least). But again this is more down to the industry structure than the product.
Then you have the question of deployment. A class 700 isn't too bad on something like the Sutton loop (ironically a route not envisaged to be part of Thameslink!), but far less so on runs to Littlehampton or Peterborough. The 345 has a similar compromise - fine for Shenfield, much less so for runs out to Reading. Again hard to make judgements on the train when perhaps they're not being deployed on the most suitable services.
Finally, it's too early to tell on reliability yet. Both types have had a rocky start, and Siemens seem to be making a trend of this, as various recent types have had teething issues. Bombardier have had the advantage that many of their recent introductions have been based on a very long established platform. It's way too early to make judgements on long term performance.
Having said all that, it does appear as things stand at the moment that the Aventra is leading the race. Time will tell if things stay that way.