Home > Puma (Tdci) > 2.2 poor fuel economy |
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NinetyTD4 Member Since: 22 Apr 2011 Location: North Posts: 397 |
No mods at all, plain factory delivered status of the 90 - on average for the last 17.000 miles I am now at 35.3 mpg - about 20 percent less then LR quotes. And yes, I do check mileage with my GPS tracker log and the speedo is almost equal to miles travelled by GPS. 55 mph is my travel speed ... Never forget: cars have owner, Landrover have field service personnel. |
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18th Aug 2012 10:19pm |
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x-isle Member Since: 26 May 2011 Location: Midlands Posts: 1327 |
Can someone explain to me why the 2.2 isn't towing as good as the 2.4?
I thought that both bhp and torque output was exactly the same and the powerband was pretty similar. This is all due to the variable turbo (which is a nifty bit of kit) fitted to the 2.2. So, how does an engine with the same power output matter if it's 2.2 or even 0.8? Albeit not in a Land Rover, I do have a motor with the 2.2 engine and it's pretty awsome. What you have to remember, this is the heart of the worlds most popular and versitile machine, the Transit. Yes, ok it's tuned differently for the Landy, but come on, if it didn't have the capabilities of the existing engine, the Transit wouldn't continue to be a success. Craig Rogers 2007 Puma 110 XS 2011 Evoque Coupe Dynamic Lux www.craigrogers.photography |
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20th Aug 2012 7:41am |
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dgardel Member Since: 30 Nov 2008 Location: Veneto (Heart & Head) Posts: 3586 |
Also the 2.4 has the variable geometry turbo............. Discovery 5 td6 HSE Stornoway Gray Outback Engineering Limited Edition IID Pro MV License |
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20th Aug 2012 4:54pm |
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Glynparry25 Member Since: 16 Feb 2009 Location: Miserable Midlands Posts: 3015 |
Our brothers across the pond have the best answer to this: There is no replacement for displacement Simple law when it comes to an engine.... you can have a 6.7 litre V8 with the same 'figures' and a tuned up 1.6 straight 4. Fact of life is that they will feel so much different to drive- especially when you start adding loads etc. Glyn |
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20th Aug 2012 4:58pm |
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dgardel Member Since: 30 Nov 2008 Location: Veneto (Heart & Head) Posts: 3586 |
120% well said Glyn!!!! (look on my sign ) Discovery 5 td6 HSE Stornoway Gray Outback Engineering Limited Edition IID Pro MV License |
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20th Aug 2012 4:59pm |
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Glynparry25 Member Since: 16 Feb 2009 Location: Miserable Midlands Posts: 3015 |
You are a man after my own heart
Glyn |
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20th Aug 2012 5:00pm |
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x-isle Member Since: 26 May 2011 Location: Midlands Posts: 1327 |
Still not convinced, torque is torque and delivery should be similar. Not saying it's not correct, but if someone has a scientific reason.....
I agree that bigger cc can produce more torque and have a better delivery of it (power band), however, if there are 2 engines with the same torque and the same powerband then they will be equal no matter what cc they are. Does anyone know if the powerband is that much different between the 2 engines which will give the differences tow'ers are noticing? As for the 2.4 having the variable tubby, every day's a school day! Craig Rogers 2007 Puma 110 XS 2011 Evoque Coupe Dynamic Lux www.craigrogers.photography |
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21st Aug 2012 5:40am |
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spudfan Member Since: 10 Sep 2007 Location: Co Donegal Posts: 4646 |
Wonder if the dpf is acting as a restriction in getting rid of the exhaust and perhaps that might account for it? 1982 88" 2.25 diesel
1992 110 200tdi csw -Zikali 2008 110 2.4 tdci csw-Zulu 2011 110 2.4 tdci csw-Masai |
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21st Aug 2012 11:14am |
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x-isle Member Since: 26 May 2011 Location: Midlands Posts: 1327 |
All maybe, but then the power output would be reduced.
Either LR are telling us porkies that the output is the same, or the 2.2 gets it's (same) torque output higher up the rev range. Which would be noticed when tugging. Craig Rogers 2007 Puma 110 XS 2011 Evoque Coupe Dynamic Lux www.craigrogers.photography |
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21st Aug 2012 11:25am |
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Odin Member Since: 29 Apr 2011 Location: Aberdeenshire Posts: 237 |
Good point. Similar performance curves of torque and power vs rpm must equal similar steady state performance albeit no consideration of mass amd acceleration If anything could the smaller unit accelerate faster due to lower inertia? But then does the dpf increase back pressure from the exhaust? I'm always reluctant to default to American rule of thumb without robust explanation of the physics. I can see how larger displacement with more cylinders changes the engine's response, and I can see how a heavier unit of equivalent material may last longer due to being over-engineered, but in reality I can't see how more displacement for similar power curves changes the day-to-day performance? I'd love to hear otherwise. |
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21st Aug 2012 8:27pm |
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Glynparry25 Member Since: 16 Feb 2009 Location: Miserable Midlands Posts: 3015 |
If power and torque is all that matters, why haven't Land Rover down scaled it to either the 2.0 puma (can easily produce more power than 120/350 or even the 1.8 Audi lump which can also produce about 150/330? My 3.5 V8 EFI Discovery had a little more HP and less tourque but was an awesome car to tow- had upto 2 ton behind it and not even a sniff of power loss.
Land Rover want to keep as big an engine as possible but are still having to follow Europeal legislations (same reason why they went from 2.5 to 2.4). To get EU5 certified it has to have a DPF- that means in many European countries you have a sticker in the windscreen with a 5 on it. If you then remove the DPF you have just broke the law as a DPF reduces the soot output by about 85-100% over a non-DPF engine.... therefore dropping it down to EU4.
Anything in the system will increase back pressure......... not good . Glyn |
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22nd Aug 2012 8:00am |
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Odin Member Since: 29 Apr 2011 Location: Aberdeenshire Posts: 237 |
I don't know - that was our/my question!
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22nd Aug 2012 7:11pm |
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NinetyTD4 Member Since: 22 Apr 2011 Location: North Posts: 397 |
As LR is no longer building engines, they had to take what they can get without breaking their EU-typrating - and that binds them to Ford and its Transit engines. As Ford decided to only bring the 2.2 Puma to EU5 emission, there was no choice at all. Never forget: cars have owner, Landrover have field service personnel.
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23rd Aug 2012 6:49am |
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BigWheels Member Since: 21 Mar 2010 Location: Somerset Posts: 1405 |
300 miles per 3/4 tank for my 90 Puma, say 350 to light & bell alarm at best. Tyres do matter, as more road-friendly will help. Air conditioning switched on will use fuel up.
The seeming less sturdy parts 2.2s have been said to have above, would worry me more than mpg. Land Rover Defenders. 67 years heritage, minimal appearance changes, still going strong all over the world. Not a fashion vehicle, but fashionable to own. Made for the needy, not the greedy. Ta ta Defender |
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24th Aug 2012 6:10pm |
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