(18 Jul 2015, 7:20 pm)S813 FVK wrote Why have Volvo chosen to use a 5 litre engine as opposed to a 9 litre like ADL? They're losing customer (the bus operators) interest right there when it comes to long distance routes - i'd chose the bigger engine any day of the week.
ADL is not a 9-litre - it is a 6.7 litre if I recall correctly. Scania (on ADL bodywork) is the only manufacturer offering a 9-litre.