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Andy B
Joined: 12 Jan 2005 Posts: 3920 Location: Brum
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Treacodactyl Downsizer Moderator
Joined: 28 Oct 2004 Posts: 25795 Location: Jumping on the bandwagon of opportunism
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dougal
Joined: 15 Jan 2005 Posts: 7184 Location: South Kent
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dougal
Joined: 15 Jan 2005 Posts: 7184 Location: South Kent
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Posted: Thu Mar 23, 06 1:22 pm Post subject: |
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Northern_Lad wrote: |
...but diesel gives off less carbon by volume as petrol. |
Err no.
Burn a litre of petrol and a litre of diesel.
You will get more carbon from the diesel.
And from an efficient car engine that will be as CO2, even though some of the carbon is released as particulates, and a tiny amount as CO.
I have just looked at the figures for the Citroen C3
Comparing the 1.4 HDi (diesel) with the 1.4i (petrol)
The diesel is better on carbon emissions by 24%
But its mpg fuel economy figures are better by 43% urban, 32% outside, and 36% combined.
So that diesel is more efficient than that petrol engine, but the mpg figures overstate its advantage because diesel is something like 10% more dense than petrol.
EDIT even more clearly seen with the C1
1.0 petrol and 1.4 diesel give identical emissions (ie carbon consumption) figures at 109g/km
Mpg figures are
51, 69, & 61 overall petrol
53, 83, & 69 overall diesel
and a non-contentious reminder that its currently easier to use a biofuel in a diesel than a petrol engine. |
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Mrs Fiddlesticks
Joined: 02 Nov 2004 Posts: 10460
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Posted: Thu Mar 23, 06 2:16 pm Post subject: |
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do you think there will be a rush for 4wd owners to have them converted in to LPG?
There was a sensible comment from the Countryside Alliance about all this. It pointed out that a higher road tax on these type of cars will affect those who live and work in the country and who need that sort of vehicle to do their jobs.
I've got the impression the real issue with big cars is more to do with clogging up the cities with 'chelsea tractors' .
I drive a 4 litre Jeep, old and rarely washed, its not a status symbol. I don't use it every day by anymeans. I shop no more than once a week if that, so its not being used in urban situations much. We have a Polo 1.4 for OH's commute and most long journeys. But the Jeep is the only thing we can fit a rotavator in to, to take it up the plot. Chicken bedding and other plot based sundries ( compost, fence posts, plants, tools etc, etc) would be an interesting challenge in the polo. We live in a small village with no shops; its 20 mins to the nearest town/supermarket. In order to be able to live the self-sufficient, rural life we want to,we need a car that can cope with large loads,passengers and awkward country lanes.
I'd happily pay per mile or for entering a town/city rather than being punished generally for using a vehicle (which I know is a gas guzzler) that I feel we genuinely need to use. |
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