Pyrover Posted March 21, 2007 Share Posted March 21, 2007 Ok there's a lot of talk about CO2 emission levels at the moment (thanks to the budget) and I know that figures for the later engines are often quoted, but just how much CO2 is produced by the older Land Rover engines. Quote Link to comment Share on other sites More sharing options...
white90 Posted March 21, 2007 Share Posted March 21, 2007 they aren't quoted for CO2 emission prior to 2001 IIRC Quote Link to comment Share on other sites More sharing options...
Pyrover Posted March 21, 2007 Author Share Posted March 21, 2007 So I'm lead to believe, but surely someone has measured the amount just out of curiosity. Quote Link to comment Share on other sites More sharing options...
SteveG Posted March 21, 2007 Share Posted March 21, 2007 So I'm lead to believe, but surely someone has measured the amount just out of curiosity. No they haven't Steve Quote Link to comment Share on other sites More sharing options...
Ivan Posted March 21, 2007 Share Posted March 21, 2007 No they haven'tSteve And if they have keep quiet or Robbing B*stard Gordon will be after us. Ivan Quote Link to comment Share on other sites More sharing options...
Pyrover Posted March 21, 2007 Author Share Posted March 21, 2007 I must have touched a raw nerve or something (probably recovering from the shock of the budget). Quote Link to comment Share on other sites More sharing options...
Mo Murphy Posted March 21, 2007 Share Posted March 21, 2007 I think it would be accurate to say none since only vehicles produced since 2001 need to have it measured. Mo Quote Link to comment Share on other sites More sharing options...
Simon Smith Posted March 21, 2007 Share Posted March 21, 2007 Mine is carbon neutral thanks to chip fat Quote Link to comment Share on other sites More sharing options...
BogMonster Posted March 21, 2007 Share Posted March 21, 2007 Mine is carbon neutral due to the fact that I don't give a fig and would welcome some warmer weather Quote Link to comment Share on other sites More sharing options...
Lars L Posted March 21, 2007 Share Posted March 21, 2007 Easy enough to calculate. Fuel consumption in litres per 100 km multiplied with 24 for petrol engines and 27 for a diesel gives CO2 i grams per km. Quote Link to comment Share on other sites More sharing options...
Tractorboy16 Posted March 21, 2007 Share Posted March 21, 2007 my good, i thought i had heard enough of this topic, its end of term on friday and im currently writing the worst essay of my university life on biofuel and ethanol. Now how many different CO emmitted quotes do you think there can possible be. I even have a Accademic journal here quoting three different figures. Im sure our land rovers ahll be some where near the high end, However, some interesting reading. one kilometer driven by a convential midsized passenger american vehicle running on gasoline releases about 408g CO2 eq. one kilometer driven in a conventia midsized passenger american vehicle E85 (85% ethanol, 15% gasoline) emits 155-242g CO2 eq. Rather a big difference, i saw we all plant lots of wheat and maize just like america is doing and then realise once we have sold the years quote for ethanol production as its a higher price than human consumption prices that there isn't enough crop to the feed the country as well!!! WHAT SHALL AMERICA DO!!! sepose i best get back to the essay now, it always seems easier to write on here than in word!!! James Quote Link to comment Share on other sites More sharing options...
SteveG Posted March 21, 2007 Share Posted March 21, 2007 I must have touched a raw nerve or something (probably recovering from the shock of the budget). Mine was a joke, should have added some smileys Steve Quote Link to comment Share on other sites More sharing options...
Hybrid_From_Hell Posted March 21, 2007 Share Posted March 21, 2007 I'll pass on this thread Nige Quote Link to comment Share on other sites More sharing options...
geoffbeaumont Posted March 22, 2007 Share Posted March 22, 2007 So I'm lead to believe, but surely someone has measured the amount just out of curiosity. There are various online calculators around, most of which are wildly imprecise and disagree with each other. This one at least allows accurate input (mpg, mileage and LPG, petrol or diesel). Another one I just tried only allowed me to give mileage and engine size (>2litres), and reckonned I release as much carbon in a couple of months as the one linked says I do in a year... All the online calculators I've found are run by people with an interest in convincing you you're doing massive environmental damage (mostly they're selling carbon offsetting), so bear that in mind. None of them give the calculations they're using. Quote Link to comment Share on other sites More sharing options...
white90 Posted March 22, 2007 Share Posted March 22, 2007 Easy enough to calculate. Fuel consumption in litres per 100 km multiplied with 24 for petrol engines and 27 for a diesel gives CO2 i grams per km. using that as gallons(4.54litres p gallon)- per 61miles(100km) 90 does 22mpg so would use 2.77 gallons(12.58l/100km)x27 for diesel=339.66 grams per km if that working out is correct Vals TD5 is 299grams/Km luckily the 90 being older attracts less VED than the TD5 I guess I'd better email gordon broonie and offer him some more ££. ------------------------------------------------------------------------------------------- I think a prize is in order for the worst g/km or best as using more must be better surely So a couple of LR4x4.com stickers to the worst. I'll pay for the stickers/postage etc. Quote Link to comment Share on other sites More sharing options...
Top90 Posted March 22, 2007 Share Posted March 22, 2007 Mine is carbon neutral thanks to chip fat Mine are carbon neutral thanks to having some trees. Quote Link to comment Share on other sites More sharing options...
Ivan Posted March 22, 2007 Share Posted March 22, 2007 Using the above formula, my Discovovery does about 400Kms per tank (80 Ltrs) which is around 20Ltrs per 100Km. This gives me a value of 480 gramms per KM. Ivan Quote Link to comment Share on other sites More sharing options...
Pyrover Posted March 22, 2007 Author Share Posted March 22, 2007 Cheers guys that's exactly the type of answer I was looking for, the "you can simply work it out for your self like this..." ones are always the best. According to my abacus my 2.5NAD knocks out around 268g/km. All of a sudden the £5 increase doesn't look too bad now. Quote Link to comment Share on other sites More sharing options...
simonr Posted March 22, 2007 Share Posted March 22, 2007 My 200tdi has come out as 266.7, averaged over 60,000 miles (I've kept accurate fuel & mileage records!). The best it has achieved is 229.5 on a long run. Either way, it's still a gas guzzler! Si Quote Link to comment Share on other sites More sharing options...
Superpants Posted March 22, 2007 Share Posted March 22, 2007 Feeling very geeky in my lunch hour I thought I’d try and work this out from first principals. It’s some time since I did any organic chemistry so I’m rather rusty, but with a bit of digging on the internet and scratching my head, I have come up with the following. Petrol normally has between 5 & 10 carbon atoms in the chain, therefore I will take an average length of 8 atoms. Therefore the reaction on burning is: 2C8H18 + 25O2 -> 16CO2 + 18H2O This assumes clean burning, which although isn’t strictly true (CO, NOx etc), shouldn't be too bad an assumption as the quantities of these are so low compared to the CO2 C has an atomic mass of 12 H has an atomic mass of 1 O has an atomic mass of 16 Therefore: C8H18 has a mass of 114g/mol O2 has a mass of 32g/mol CO2 has a mass of 44g/mol H2O has a mass of 18g/mol Therefore using the reaction above, 1 mol of petrol releases: 8 mols of CO2 = 256g 9 mols of H2O = 162g Petrol density is 737g/l therefore 1 litre contains 6.46 mols Therefore burning 1 litre of petrol releases: 6.46 x 256g = 1655g of CO2 6.46 x 162g = 1047g of H2O Using Ivan’s vehicle as an example then: 80 litres to travel 400km gives: 400/80= 5km/l So CO2 is 1655/5 = 331 g/km Which differs significantly to that given by the calculation shown by lars which quotes 480 g/km. So is it me who has got it wrong? Have I made some duff assumptions, or made an error in my calcs, or is it that the published info is out for some reason? Quote Link to comment Share on other sites More sharing options...
Pyrover Posted March 22, 2007 Author Share Posted March 22, 2007 BLIMEY....!!! Quote Link to comment Share on other sites More sharing options...
Lars L Posted March 22, 2007 Share Posted March 22, 2007 Well, don't ask me. I wrote in good faith what I read in a motor trade magazin. Won't keep me awake at night though, that's for sure. I believe I have done my part. The commercials for Toyota Prius says that one saves a ton of CO2 compared to a "normal" car. I have changed the heating system in my house from fuel oil to wood pellets, that will save some 10-12 tons per year. So, I'll just keep on driving my Landies. Quote Link to comment Share on other sites More sharing options...
Simon Smith Posted March 23, 2007 Share Posted March 23, 2007 I'm an engineer, not a chemist, so I want to ask. How does slightly under 1 Kilo of petrol emit more than a Kilo of CO2 Quote Link to comment Share on other sites More sharing options...
white90 Posted March 23, 2007 Share Posted March 23, 2007 No chemist either but my take on the subject is the explosion of the fuel driving the piston down must mean the fuel /air mix grows. like the detonation of any explosive small amount of explosive material grows many times as a gas. Quote Link to comment Share on other sites More sharing options...
geoffbeaumont Posted March 23, 2007 Share Posted March 23, 2007 I'm an engineer, not a chemist, so I want to ask.How does slightly under 1 Kilo of petrol emit more than a Kilo of CO2 You're forgetting one of the reactants...oxygen! The CO2 is composed of one carbon and two oxygen molecules (that's what the formula CO2 means). The carbon comes from the petrol, the vast majority of the oxygen comes from the air. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.