On 20/12/11 10:39, Dave Plowman (News) wrote:
In ,
wrote:
http://www.bbc.co.uk/news/uk-england-london-16244634


"It was later established that the bus had run out of diesel."

Just like a Pious, then. Half decent fuel consumption in start stop town
traffic, but far worse than a conventional vehicle at near steady speed
motorway, etc, work.


That's not true for the Prius. You still get better mpg than a conventional
petrol car on motorway trips, as once you're up to speed you can ease off the
pedal and the electric motor does most of the work to keep you at-speed,
requiring much lower power output from the engine.

The engine is Atkinson cycle too, so beats a regular petrol engine at low RPM.

Unlikely to beat a modern diesel's MPG figures on these kinds of trips though.

I've oft wondered why they don't use LPG for busses? Virtually no
pollution other than CO2. Engines are much quieter too.


They did, in Northampton.

http://www.showbus.com/gallery/wm/northampton.htm

(part-way down).