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Home > General > TD4 Auto fuel economy |
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Nick Jan Member Since: 23 Aug 2007 Location: Nr Shoreham-by-sea, West Sussex Posts: 441 |
I know there's another long (6 page) string about fuel ecomomy, however I wanted to focus specifically on TD4 Auto fuel economy.......
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20th Nov 2007 10:34 pm |
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carlfraz Member Since: 10 Apr 2007 Location: Minkies lap dancing club Posts: 839 |
Since you can change up and down sooner on the C Shift i expected that to be best for fuel as the auto's hold the revs higher before changing up. I would have expected the std auto on that philosphy to be second with sports being worst????? You say my second and third should be reversed???????
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21st Nov 2007 2:00 pm |
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Pheasantplucker57 Member Since: 23 Jul 2007 Location: Just north of Glasgow Posts: 27 |
Had mine now for just over 2700 miles...averaging just over 28mpg, and I have never had a reading over 30mpg!! Mostly town driving, and, for any motorway driving I do, I cruise at an incredible 60mph. Very gentle on the throttle, but nothing seems to help. Freelander 2 GS Auto black + privacy glass
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21st Nov 2007 2:29 pm |
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Nick Jan Member Since: 23 Aug 2007 Location: Nr Shoreham-by-sea, West Sussex Posts: 441 |
On longer trips I can get 32 - 34 mpg quite easily, without driving like a total pussy On more mixed driving that level of fuel economy slips to between 30 - 32 mpg. I have never averaged much below 30mpg other than on very short trips; today the average is showing at 29.6mpg after recent in town trips of about 8 miles.
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21st Nov 2007 7:42 pm |
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Corinthian Member Since: 13 Oct 2007 Location: Worcester Posts: 4 |
I've just done a trip from Worcester to Bracknell & back again - 215 miles and the average was 34 mpg - not great but so much better than my old Shogun |
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22nd Nov 2007 7:21 pm |
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avtur Member Since: 11 Nov 2006 Location: Stockport Posts: 1306 |
I have a TD4 manual, very pleased with the fuel economy, average sitting at 37.4 over 22k miles. My car will be replaced in 18 months and I will likely go for auto (not available when I ordered mine in Nov 06). A question I have about the auto, which will have a direct impact on fuel consumption, but which has not yet been answered to my satisfaction is .... does the auto box have have a "lock up" feature in 6th gear (possibly 5th as well) ????? This will make a difference to fuel economy, and will be especially effective when 'cruising' .... So has anyone asked the question about lock up and if so what was the answer .... |
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22nd Nov 2007 10:53 pm |
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npinks Member Since: 28 Jun 2007 Location: Ls25 Posts: 20090 |
Not sure what the lock up feature is? but found this searching for it on the web, is it on about the same thing (this does not refer to the FL2, but explains what the lock up feature is on automatics with lockup) Former Mod/Member, with the most post & Chicken George Arch nemesis |
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22nd Nov 2007 11:07 pm |
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avtur Member Since: 11 Nov 2006 Location: Stockport Posts: 1306 |
Nice search npinks, in simple terms a lock up does what it says, it locks the torque converter.A torque converter will always allow a certain amount of slippage, this is what hits the fuel economy of an auto. However a lock up provides 100% drive when engaged, as per a manual box, therefore increasing efficiency. The reason for my question is simply that not all autos have this feature. I'm not sure what determines the use of a lock up, its not a premium brand feature, Mrs Avtur's 1600cc petrol Deawoo automatic does have this feature. |
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23rd Nov 2007 12:11 am |
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Nick Jan Member Since: 23 Aug 2007 Location: Nr Shoreham-by-sea, West Sussex Posts: 441 |
Avtur,
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23rd Nov 2007 12:53 am |
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defkalion Member Since: 17 Feb 2007 Location: Athens Posts: 350 |
Avtur I've read several times (at least two ) in the forum that our FL2's have a lock-up feature in 6th gear. I'll try to ask my service dealer if it's true and let you all know. Nevertheless, I've noticed that auto is most thirsty when in traffic, and I beleive that's because the torque converter is so much less efficient at very low speeds - too much torque from the engine, not at all on wheels when starting from stand still. So, if you use the car on motorways most of the time the difference between manual and auto should be even less. And as Carl has said several times( ) command shift does also make a difference. |
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23rd Nov 2007 6:51 am |
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4eveRed Member Since: 25 Aug 2007 Location: Leeds Posts: 22 |
All,
I've not idea why the car should be so fuel inefficient. I can understand it not being up to scratch on motorways etc due to drag coefficiency, but in town, I would have thought it not to be too disimilar to any other similarly powered car/van. Anyways, my tuppence on the subject. 4eveRed |
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23rd Nov 2007 7:21 am |
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mjb Member Since: 30 Aug 2007 Location: Hessen Posts: 47 |
It helps to reset the tour from time to time. I was doing pretty well until I did some stop starting in town - this pushed the MPG way down, and no amount of careful motorway driving could get it up again. Its an average reading, over the tour distance. - Mike |
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23rd Nov 2007 9:19 am |
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mjb Member Since: 30 Aug 2007 Location: Hessen Posts: 47 |
Well, your powering all four wheels for one, so its always going to be more inefficient than a comparable 2 wheel drive. And to be honest, I find it pretty good on the motorway - I get about 7.6L at a steady 120Km/h, which is better than my girlfriends Peugeot 206. - Mike |
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23rd Nov 2007 9:26 am |
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Grimbo Member Since: 04 Jul 2007 Location: Grimsby Posts: 72 |
My auto has never returned less than 30mpg during town driving and between 34-37mpg on the motorway (solo).
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23rd Nov 2007 9:44 am |
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