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| grafty99 Member Since: 15 Aug 2012 Location: North Devon Posts: 4785   
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It should sit at 70mph no problem. Although with the mentioned modifications and standard gearing I'd expect low 20s to the gallon
 2002 90 Td5 Station Wagon
1990 Vogue SE Triumph Tiger Explorer 1200 Td5 90 Thread http://www.defender2.net/forum/topic50767.html Tdi 110 Thread https://www.defender2.net/forum/topic69562.html RRC Thread http://www.defender2.net/forum/topic54492.html Instagram http://www.instagram.com/george_grafton |
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24th Dec 2018 8:03am |
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| TJH1985 Member Since: 22 Aug 2016 Location: Midlands Posts: 238
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Not a 110 but my 90 will sit at 70/75 quite nicely, we did 2,500 miles in summer across Europe and on the tanks I tracked it was doing 27mpg including allot of messing about!
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24th Dec 2018 8:23am |
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| MJN110 Member Since: 18 May 2015 Location: North Yorkshire Posts: 380 
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I agree with grafty99 I think you will be looking at low 20s at 70mph.
I feel my TD5 feels best running at 60mph maybe because the noise level is significantly lower at 60mph. I have experimented with checking fuel consumption at different speeds above 60mph and have noticed consumption rises quite dramatically as you cruise faster and i have a 90 with no roof rack and running standard Continental cross contact tyres. At the end of the day you are pushing a vehicle along that has the aerodynamics of a garden shed and above 60mph a considerable amount of extra power is required to produce a little extra speed if you look into the physics of it. I also drive a 2.2 Puma that I often here people on this forum criticise for poor fuel consumption compared to there old TD5s etc. I think the reason is because the Puma is quieter and more refined at speed ( better sound insulation and 1.2 transfer box) so people tend to drive them faster but at the end of the day it is still a garden shed so you will pay the price at the pumps. 2016 Defender Landmark 90 2005 Defender CSW TD5 90XS |
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24th Dec 2018 9:24am |
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| TJH1985 Member Since: 22 Aug 2016 Location: Midlands Posts: 238
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I should add, I have a puma transfer box in my TD5 which might explain why it’s happy to do 70 without much noise you certainly can’t tell the difference between 60 and 70.
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24th Dec 2018 9:41am |
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| landy andy Member Since: 15 Feb 2009 Location: Ware, Herts Posts: 5642 
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60mph in a complete standard Td5 with rack and winch. Can do upto 95mph, but at 60 it’s happy and quiet. Put a disco/Tdci transfer box on and 70mph is the preferred. A lot just depends on what you think to the noise, and your opinion on “working” the engine.
Fuel economy I don’t care about, it’s a Defender. |
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24th Dec 2018 10:06am |
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| Adam17 Member Since: 15 May 2018 Location: Within Bedfordshire Posts: 1193  
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My td5 110 wouldn't sit a 70, it struggled at 60 to be fair.. But after a spot of remapping it sits a 70 nicely, and is able to overtake safely... but don't expect much mileage per gallon...
 Regards
Adam Loving The Duchess The Defender 110 TD5 XS My Defender story - http://www.defender2.net/forum/topic64005.html |
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24th Dec 2018 11:27am |
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| Titan133 Member Since: 30 Dec 2016 Location: Dorset Posts: 46 
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Thanks everyone. It sounds like 60mph isn’t too bad then. ——————————
2004 110 TD5 |
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24th Dec 2018 11:38am |
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| Adam17 Member Since: 15 May 2018 Location: Within Bedfordshire Posts: 1193
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You'll get best fuel economy at 50mph. especially if you can sit at 50 for the hole tank, youll get 4-500miles. Regards
Adam Loving The Duchess The Defender 110 TD5 XS My Defender story - http://www.defender2.net/forum/topic64005.html |
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24th Dec 2018 1:09pm |
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| miker Member Since: 13 Sep 2015 Location: Surrey Posts: 1762 
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Mine is quiet(ish) at 60, but will also sit up to 80 relatively happily, it just makes a racket!
I think I have a tired fuel pump though, as after a long journey heavily laden it struggles on hills. |
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24th Dec 2018 1:25pm |
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| 4RF RDS Member Since: 19 Jul 2015 Location: Ottawa Posts: 919  
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60-70 is about right with a 1:4 (standard Defrnder transfer case). Best mileage in my 110 is at 100 kph (60). And with my overdrive it’ll cruise all day long at 140. Though at that speed mileage is way down like 24 mpg. Noise is comperable to doing 60 without OD so it is VERY quiet at 60 with the OD engaged. Well worth it if you do any kind of highway driving.
Cheers and Merry Christmas. 2010 Range Rover MkIII Autobiography Super Charged (Idris) 2003 Range Rover Mk III (Desmond FitzWilliam) 2000 Defender 110 CSW TD5 (CTX) 1992 Range Rover Classic (Lizzy) 1972 Series III 300 Tdi (Stanwood) 1967 MGB GT Every normal man must be tempted at times to spit on his hands, hoist the black flag, and begin to slit throats. H. L. Mencken (1880 - 1956) |
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24th Dec 2018 1:34pm |
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| lightning Member Since: 23 Apr 2009 Location: High Peak, Derbyshire Posts: 2698
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Best cruising speed is supposed to be 2/3 maximum engine RPM.
So in a standard Defender that would be 3,000 rpm....65mph. My 110 TD5 seems happiest at around 65mph, it’s got a mild remap so will sit at 75mph but it’s happier at 65. |
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24th Dec 2018 2:54pm |
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| jst Member Since: 14 Jan 2008 Location: Taunton Posts: 7983  
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I used to sit at 60in my td5. Consider increases tyres to 55 or so for a long motorway run to improve consumption. Cheers
James 110 2012 XS Utility 130 2011 M57 bespoke Camper 90 2010 Hardtop 90 M57 1988 Hardtop |
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24th Dec 2018 3:50pm |
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| donmacn Member Since: 06 Nov 2017 Location: Nth Scotland Posts: 1841
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Some of you probably know this already, but fwiw:
I usually sit at 60mph on the clock. If I take a GPS speedo into the car - an app on my phone - then I'll find I'm actually doing 55/56mph. This variation is more or less constant up and down the clock. And it's not just Defenders. To be sure of things, if I pick up a hire car, I'll routinely check the car speedo vs the GPS. Most times I'll find the car speedo is about 5mph slow. I'm assuming this is something built into things by the manufacturer to avoid being sued if too many folk were to get caught speeding...? I don't know, maybe that doesn't make much sense, but I do know that I've consistently found this discrepancy. I've even used a couple of different apps, to be sure it wasn't something in the software. To answer the original question though, I too sit about 55/60mph on middling A roads, maybe 5mph faster on better tarmac/better aligned roads or motorway. Like others, the old girl will get up to 80+ eventually, but it's pretty noisy. Donald 1994 Defender 300Tdi 110 SW - owned since 2002 - 230k miles and going strong (The 'rolling restoration' or tinkering thread: http://www.defender2.net/forum/topic58538.html ) 2000 Range Rover P38 4.0L V8 in the past.. RR classic - fitted with 200Tdi 1984 RR classic - V8 with ZF auto box 1993 Discovery 300Tdi not to mention the minis and the Type 2 VW camper... |
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24th Dec 2018 3:59pm |
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| Adam17 Member Since: 15 May 2018 Location: Within Bedfordshire Posts: 1193
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Wow 55psi? How did it effect the handling? Mine are running 36 up front and 38 at rear. I should imagine it feels floaty?? Regards
Adam Loving The Duchess The Defender 110 TD5 XS My Defender story - http://www.defender2.net/forum/topic64005.html |
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24th Dec 2018 4:00pm |
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