 | Home > Puma (Tdci) > Efficiency improvements and miles to a tank 2.4 90 |
 
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I may have to go to extreme measures
| Grenadier Member Since: 23 Jul 2014 Location: The foot of Mont Blanc... Posts: 5816   
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Interesting, I’ll do a test on Thurs as I will be filling the tank to the brim and then driving to Barcelona from here in the Alps. Last week I drove back to the UK and 1.5 tanks got me to London (Hammersmith), then a drive and back to Stevenage, then Wimbledon, and eventually Bookham and Dorking in Surrey before a refill.
Next tank got me to Bristol and then back to Dover and well into France. So I’ll check how far I get on Thurs as it’s basically one road, no ferries, no detours, no stops. I’m also running KO2s, but 18”, and I’m in a 110 DCPU (larger tank), now with a rack so no doubt reduced aerodynamics, ergo mileage. But I’ll see. As for what you can do, go up to a stage 2 remap for the very best managed fuelling and low down torque allowing quicker up shifts at lower revs? I wonder if a larger intercooler will help a tiny amount by keeping the engine cooler? Obviously smaller, thinner (and therefore uglier), road biased tyres? Remove any external body work/additions such as racks, roll cages, canopies, light bar etc? -1” springs for reduced ride height? And depending on how you drive, what about a cruise control set up for just a couple of hundred quid? But I think all of the above will be tiny, incremental changes when considering the laws of physics that forcing a brick through air requires. Every little helps, as they say, but will the value of any improved mileage balance the costs of investing in any new parts? That might be a long wait, even at current petrol prices. Bit like solar panels, reduced annual costs once fitted, but if they’re an upgrade to your house (as opposed to included in the cost of a new build) can take as much as 25 years to pay off. Monsieur Le Grenadier I've not been everywhere, but it's on my list..... 2011 Puma 110DC - Corris Grey |
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11th Apr 2022 6:15am |
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| AMBxx Member Since: 24 Jul 2016 Location: York Posts: 1032  
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I found that changing to a road tyre made no measurable difference. Only real change was noise.
For a 90 that looks good. I have a 110 now, but on a 90 Td5, the best I managed was 350. Was normally about 320. Bit easier on a Td5 as driving at 70 wasn't pleasant. When this has been discussed before, the only solution seems to be to drive more slowly. The Defender isn't the most aerodynamic shape! |
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11th Apr 2022 6:17am |
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| kenzle8a Member Since: 12 Feb 2020 Location: None Posts: 1074 
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No amount of lowering / adjusting is going to de-brick a defender.
I don’t think my TD5 is that bad when it comes to fuel, i get around 500 miles to a tank and quite often closer to 550 when I’ve not been towing. |
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11th Apr 2022 6:52am |
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| AMBxx Member Since: 24 Jul 2016 Location: York Posts: 1032
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550 miles? Was that with a 2nd fuel tank?
Td5 had a 13.2 gallon tank. You'd have to get close to 42 mpg to do 550 miles. Official mpg was 28, though 30 wasn't hard to get. |
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11th Apr 2022 7:22am |
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| blackwolf Member Since: 03 Nov 2009 Location: South West England Posts: 17386 
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I consistently get around 400 miles to the tank from mine, which is a 2.4 110 (so larger tank than a 90), runs at around 3 tonnes normal weight, has 255/85 mud tyres plus a full length rack with light bars, a BAS remap, an RAI, and is generally optimised to burn fuel with great enthusiasm.
Towing a additional 3.5 tonnes on a trailer, or sustained running above 60mph makes a massive impact on the world's dwindling reserves of fossil fuels but is very good for the countries finances in terms of tax revenue. The biggest single difference is how hard you press the throttle pedal. |
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11th Apr 2022 7:28am |
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| AMBxx Member Since: 24 Jul 2016 Location: York Posts: 1032
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Could the difference in range between a 90 and 110 have more to do with the 110s much bigger fuel tank?
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11th Apr 2022 7:38am |
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| wyvern Member Since: 13 Dec 2009 Location: Cornwall Posts: 2108 
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Ours is the same - I tend to get about 400 miles per tank on long drives each month - Cornwall to Aberdeen and back, mostly on motorways at 60-65ish, fully kitted camper with standard tank, standard size BFG ATR tyres and full length roof rack. When we drove the NC500 the speeds were lower and we got good 450 per tank pottering along ay 40-50 ish The Right foot is the main driver for fuel use - plus all the good things like the right gear, not labouring the engine, keeping the tyres at the right pressure and preemptive driving will help with fuel economy  Poppy - TDCI (Puma) 110XS 2.2 - Camper conversion - see the build here - https://www.defender2.net/forum/topic56530.html
Elgar -TDCI(Puma) 110XS Dormobile - now sold Devon & Cornwall 4x4 Response - DC126  |
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11th Apr 2022 8:20am |
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| X4SKP Member Since: 29 Nov 2013 Location: Berkshire Posts: 2295 
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Hello TXH90
My 90 typically returns around 26-30+mpg the key difference delivering this is type of journey and (probably more importantly) driving style... 
Every day 'mix' = 26mpg Motorway at 50-60mph (6th gear all day long) =30+mpg (went to Wales last weekend achieving 34mpg for the round Trip) Motorway at 70mph = 24mpg Towing (1200kgs unladen-laden 1800kgs) Caravan = 22-26mpg (have managed 28mpg Towing + Roof Rack + Top Box) So the Range in the 90 is 300-350 with around 300 being typically when I head to the Pumps putting 40-45lts in. The 90 is running on Cooper Zeon 275 60R20's We are in the market currently for a 110 and amongst other things the larger capacity Fuel Tank / Range is a factor, our last two trips from the South to the North we manged in the 90 without using any Motorway Services to Fill Up... carrying a 20lt Jerry Can gives us a 100mile safety factor. Click image to enlarge
For what the Defender is I don't think it's too bad... SKIP https://www.defender2.net/forum/topic83242.html Last edited by X4SKP on 11th Apr 2022 4:41pm. Edited 2 times in total |
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11th Apr 2022 9:05am |
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| Caterham Member Since: 06 Nov 2008 Location: Birmingham Posts: 6298  
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me me me, my turn !
600 plus miles on a standard 110 tank. 
its all about speed. keep to 50 - 53 mph and you should get 40 mpg
forgot to say. thats with a IRB / stage 2 conversation ie remap plus larger inter cooler. |
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11th Apr 2022 9:48am |
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| Naks Member Since: 27 Jan 2009 Location: Stellenbosch, ZA Posts: 2638  
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I can get 500km easy on one tank when the reserve light comes on, but that's if I drive like Ms Daisy.
Mine's consumption in Fuelly below --
2010 Defender Puma 90 + BAS remap + Alive IC + Slickshift + Ashcroft ATB rear 2015 Range Rover Sport V8 Supercharged
Defender Puma Workshop Manual: https://bit.ly/2zZ1en9 Discovery 4 Workshop Manual: https://bit.ly/2zXrtKO Range Rover/Sport L320/L322/L494 Workshop Manual: https://bit.ly/2zc58JQ |
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11th Apr 2022 10:01am |
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| markb110 Member Since: 22 May 2010 Location: Guildford Posts: 2638 
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Come and live around here.....
Thanks to the eco wackos the local petrol stations last week only had diesel on Friday and it was gone again on Saturday. So only local journeys at present....... |
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11th Apr 2022 10:06am |
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| Caterham Member Since: 06 Nov 2008 Location: Birmingham Posts: 6298
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/\ we've had a load of local stations out of diesel recently?
anyone know why? are we sending tankers to Ukraine? |
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11th Apr 2022 10:11am |
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| Leamreject Member Since: 19 Dec 2020 Location: Middle Earth - Leamington Spa Posts: 970  
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Don’t these eco warriors understand that slashing all these tanker tyres only accelerates the problems they are protesting against…
 Ride like you stole it!!
If I’m not on a bike it’s because only a 4x4 will do… 2011 2.4 Puma 90 HT |
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11th Apr 2022 10:12am |
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| Chicken Drumstick Member Since: 17 Aug 2020 Location: Near MK Posts: 731
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Narrow tyres will give less drag and resistance and better mpg as a rule. The Puma's are not that great on fuel. We have a number of 90's on the farm. The most frugal are the Tdi's.... And a 4.4 TDV8 RR averages better mpg than any of the Puma's. |
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11th Apr 2022 10:15am |
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