Tim in Scotland wrote:

One of the biggest problems with diesels is the way that they are used. They are not for small cars that do short journeys. Also people buy them because of headline mpg, yet many small turbo charged petrols are actually as good or even better for short trips. Short trips with lots of gear changing are not what diesels are about, they are much less polluting and more efficeint drive at steady speed over longer distances, ie once fully warmed through, yet many are used for commuter driving over distances less than 15 miles.

insiorc wrote:

I understand Diesel being dirtier on a per litre burnt basis, but what about over a given mileage? Surely the increased fuel efficiency has to have some impact on the overall dirt? Typical Range Rover Sport traffic jam idling excepted of course...

Dennis

Just googled NOx - they'd better start banning it in farming too then as the tractors driving past my garden flinging that around can't be too healthy either then:

Agricultural fertilization and the use of nitrogen fixing plants also contribute to atmospheric NOx, by promoting nitrogen fixation by microorganisms

Or we better start cutting out all the lightning strikes around the world too since they contribute 8.6 million tonnes of NOx

I'd guess it's really just another way to raise money  13MY Range Rover Sport Autobiography SDV6 - mine
14MY Range Rover Evoque Dynamic SD4 Black Pack - wife's
99MY Defender 90 TD5, Soft Top Conversion - my toy, and bairns favourite

Last edited by insiorc on Wed Mar 08 2017 11:30pm. Edited 1 time in total

NOx is an issue in cities because in the presence of sunlight it reacts with oxygen to make ozone. Ozone is "a bad thing" at ground level - it's fabulous in the upper atmosphere but a nasty irritant of the eyes and lungs down here. A bit of NOx out in the fields is probably less of a problem as it can be rapidly diluted but in the relatively closed environment of a city street it's less desirable, 2012 SDV6 - it's missing a couple of cylinders
2008 TDV8 - it was a labour of love and is much missed

Of course, Laughing Gas is also one of the oxides of nitrogen (N2O) and people breathe that for fun.

Last edited by donny dog on Thu Mar 09 2017 7:59am. Edited 1 time in total

Indeed so, but you wouldn't want to breathe it constantly...  2012 SDV6 - it's missing a couple of cylinders
2008 TDV8 - it was a labour of love and is much missed

My daily work transport has a single 29,000kW Diesel engine thumping along at 104 rpm (at the moment it is putting out 2,900kw at 47 rpm), four years ago we had to fit NOX reduction equipment and now NOX emissions meet international requirements however despite now using very low and ultra low sulphur fuels we produce huge amounts more particulate that disolves into sulphuric acid when it rains on our deck............. even running in hybrid mode, as some ferries do, they still have to generate the electricity somehow to charge the batteries so more generators are fitted................. more diesel is burned! 2020 Pangea Green 1st Edition D240 New Defender 110 is here and loving it
2018 Melting Silver Mini Countryman PHEV - soon to be replaced
2015MY Corris Grey SDv6 HSE Dynamic, the best car I have ever owned, totally reliable only a cou0le of rattles in 3 years, now no longer in my care
Also in my garage is a 1996 TDi300 Defender 90 County HT made into a fake CSW

Are you sure the particulates form sulphuric acid Tim? If you're running ULS fuel where does the sulphur come from? Or is it just down to the amount of fuel you burn? 2012 SDV6 - it's missing a couple of cylinders
2008 TDV8 - it was a labour of love and is much missed

Once the carbon smuts dissolve in rain and stay on deck, the sun evaporates the liquid to a yellow colour fluid then to yellow crystal, I have always been told that is sulphuric acid. Might be something else with the low grade fuels we burn. Once out of port or the SECA areas then we burn the cheapest high sulphur fuel that the engine can handle. 2020 Pangea Green 1st Edition D240 New Defender 110 is here and loving it
2018 Melting Silver Mini Countryman PHEV - soon to be replaced
2015MY Corris Grey SDv6 HSE Dynamic, the best car I have ever owned, totally reliable only a cou0le of rattles in 3 years, now no longer in my care
Also in my garage is a 1996 TDi300 Defender 90 County HT made into a fake CSW

This makes interesting reading!
http://europe.autonews.com/article/2017030...ofile=1164

Tends to ignore the fact that there's a facelifted RRS in the pipeline in that timescale.

Correct but from what I have heard the FFRR will be updated before the RRS - expect to see the new FFRR before the end of the year and the MY18 RRS in March next year.

I think some people might also dispute that the Velar can do everything a RRS can do. I can't see why there wouldn't be room for both variants going forward. Also, if they make the RRS longer, as he suggests, that will narrow the gap on the FFRR which will also have to extend - at this rate the top models will be 100 feet long by 2030!

Lol When does it stop? wait for the new sport wait for the new FF. SVR 2018 in Santorini Black.

I'm not waiting lol buy RRS, sell, Buy Velar, Sell buy new sport 2018

If you play the timing game correctly should not lose much on any of these choices!

Another intersting article! http://www.autoexpress.co.uk/best-cars/873...value-best