(12 Sep 2020, 12:34 pm)Storx wrote tbf the Cummin's engine isn't exactly the best engine around neither. Blyth wrecked their Enviros on the 308 and the Blyth Expresses hence when they got replaced off the X21/X22 and dumped on the local routes at Jesmond. Then some of the Gemini's have has their engines replaced and others struggle at times on minor hills which they shouldn't on such as Matthew Bank on the X7 and X8. The Blyth routes are a much closer comparison than the 21/X21 for the X1.Blyth didn't have the best reputation back then. The Enviro 400s out of 7501-7513 that didn't fall into the hands of Blyth or Redcar have been mostly fine. The Cummins ISBe engine fitted in the VDL DB300 Gemini 2s at Blyth are only the 205BHP version as opposed to the 240/250BHP that has been used as ADL's integral choice on the E400 & E400MMC.
Not sure if there's been any big changes to the Cummins engine in the last 10 year but I believe they all use the same engine, maybe a slightly upgraded one on newer models.
RE: New StreetDecks & ADL Enviro400s - X-lines fleet changes