I've also just looked at the stats betweem the Euro 6 E400 and the Euro 5 Volvo B9TL.

Volvo B9TL:
- 260ps @1900rpm
- 1100nm @ 900 - 1500rpm

Euro 6 ADL E400:
- 250ps @2100rm only 200 more than B9TL
- 1000nm @ 1200 - 1600rpm

To sum it all up, the new E400 only has to work that little bit harder than the Volvo B9TL in most circumstances. It would struggle with an 80 mile foot to the floor round trip on the TTX what the B9TL can sort of cope with whilst spitting it's dummy out every now and then. But with a bit of TLC, it could handle routes like the TEN, Red Arrows and Arriva's X21, X22 and at a push with a 5 year life span before a cascade, the X18. A big pat on the back to ADL who have clearly thought it out though. Hopefully, Scania's Euro 6 offering on the E400 with the I believe 280ps Cummins engine will improve things for the big 5 endurance routes in the North East.