(17 Feb 2014, 2:58 pm)Dan wrote Even more so when you look at the figure quoted above. I believe Reading had to pay around £185k per vehicle though.

Only difference to look at is the ride quality - which is better for passengers? The gas bus may be quiet now, but how many rattles will develop 5 years down the line?
Also the cost of the infrastructure etc for first time buyers.

The cost of both will increase now what with Euro 6 legislations and all.

The Citaro is going to win hands down on ride quality any day of the week, purely for the fact it's a Mercedes. To the average customer though? I don't think many would say the 300NGs are of a poor ride quality. I was really impressed with them myself. I do think it'll be interesting 5 years down the line, as the Mercedes quality really stands out here. The first GNE batch of Citaros (5275 for example) are still as good as they were on day 1 in service. Of course that proven track record isn't there with the 300NGs yet.

I found an interesting presentation based on Coca Cola using Biomethane vs Diesel as a trial. It was the best comparison I could find on fuel costings too. Here if anyone wants a look.