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Discussion Starter #1
People Hi,

I would be extremely obliged if you could provide me with a rough figure of
how many miles a 3.9 V8 engine Discovery could make on a fuel tank.

A friend here in Greece gets around 200 miles (up to 230 occasionally) and I
think this is pretty low.

Take care
Pantelis
 
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Discussion Starter #2
On or around Sun, 3 Jul 2005 09:36:42 +0300, "Pantelis Giamarellos"
<[email protected]> enlightened us thusly:

> People Hi,
>
>I would be extremely obliged if you could provide me with a rough figure of
>how many miles a 3.9 V8 engine Discovery could make on a fuel tank.
>
>A friend here in Greece gets around 200 miles (up to 230 occasionally) and I
>think this is pretty low.


you've got a 90 litre tank. 20 gallons, for them of us that think in
gallons still. The 3.5i here does about 18 mpg on petrol, and thus would
get about 360 miles per tankful. 3.9s are normally reckoned to do a bit
better, but it depends how and where you drive, obviously.

--
Austin Shackles. www.ddol-las.fsnet.co.uk my opinions are just that
"Quos deus vult perdere, prius dementat" Euripedes, quoted in
Boswell's "Johnson".
 
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Discussion Starter #3
On Sun, 3 Jul 2005 09:36:42 +0300, "Pantelis Giamarellos"
<[email protected]> wrote:

> People Hi,
>
>I would be extremely obliged if you could provide me with a rough figure of
>how many miles a 3.9 V8 engine Discovery could make on a fuel tank.
>
>A friend here in Greece gets around 200 miles (up to 230 occasionally) and I
>think this is pretty low.
>
>Take care
>Pantelis
>


I used to fill mine after 300 miles as a rule. I once ran to 340+
when lost in the middle of nowhere with a very very pregnant missus in
the passenger seat. Nervous.... only a bit!

Generally reckoned on 18mpg, though 20 could be coaxed from it on long
and gentle cruises. Boot it about town and it could drop to perhaps
16mpg. 200 miles seems pretty bad - that would suggest 10mpg if he
really is emptying it - how much is he putting in when he refills it?
As Austin says, it's a 90 litre tank.


--

Tim Hobbs

'58 Series 2 88" aka "Stig"
'77 101FC Ambulance aka "Burrt"
'03 Volvo V70
 
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Discussion Starter #4
?im Hi,

I also fear that my friend's Disco V8 has a serious problem either with the
general condition of the engine or the Efi or ignition system.

Take care
Pantelis


"Tim Hobbs" <[email protected]> wrote in message
news:[email protected]
> On Sun, 3 Jul 2005 09:36:42 +0300, "Pantelis Giamarellos"
> <[email protected]> wrote:
>
> > People Hi,
> >
> >I would be extremely obliged if you could provide me with a rough figure

of
> >how many miles a 3.9 V8 engine Discovery could make on a fuel tank.
> >
> >A friend here in Greece gets around 200 miles (up to 230 occasionally)

and I
> >think this is pretty low.
> >
> >Take care
> >Pantelis
> >

>
> I used to fill mine after 300 miles as a rule. I once ran to 340+
> when lost in the middle of nowhere with a very very pregnant missus in
> the passenger seat. Nervous.... only a bit!
>
> Generally reckoned on 18mpg, though 20 could be coaxed from it on long
> and gentle cruises. Boot it about town and it could drop to perhaps
> 16mpg. 200 miles seems pretty bad - that would suggest 10mpg if he
> really is emptying it - how much is he putting in when he refills it?
> As Austin says, it's a 90 litre tank.
>
>
> --
>
> Tim Hobbs
>
> '58 Series 2 88" aka "Stig"
> '77 101FC Ambulance aka "Burrt"
> '03 Volvo V70
 
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Discussion Starter #5
Tim Hi,

Murphy's law dictates that running out of fuel can only happen whenyou are
in a hurry.

-------

I think that he fills up the fuel tank properly. He gets around 340 kms on a
regular basis and even goes down to around 300 to 310 kms when he steps on
the go pedal.

and yes he does have the 88,7 litres fuel tank and not the smaller one that
Discos used to have in the start of the production live.

Thanks again for everybody's input.

Take care
Pantelis

"Tim Hobbs" <[email protected]> wrote in message
news:[email protected]
> On Sun, 3 Jul 2005 09:36:42 +0300, "Pantelis Giamarellos"
> <[email protected]> wrote:
>
> > People Hi,
> >
> >I would be extremely obliged if you could provide me with a rough figure

of
> >how many miles a 3.9 V8 engine Discovery could make on a fuel tank.
> >
> >A friend here in Greece gets around 200 miles (up to 230 occasionally)

and I
> >think this is pretty low.
> >
> >Take care
> >Pantelis
> >

>
> I used to fill mine after 300 miles as a rule. I once ran to 340+
> when lost in the middle of nowhere with a very very pregnant missus in
> the passenger seat. Nervous.... only a bit!
>
> Generally reckoned on 18mpg, though 20 could be coaxed from it on long
> and gentle cruises. Boot it about town and it could drop to perhaps
> 16mpg. 200 miles seems pretty bad - that would suggest 10mpg if he
> really is emptying it - how much is he putting in when he refills it?
> As Austin says, it's a 90 litre tank.
>
>
> --
>
> Tim Hobbs
>
> '58 Series 2 88" aka "Stig"
> '77 101FC Ambulance aka "Burrt"
> '03 Volvo V70
 
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Discussion Starter #6
On Sun, 3 Jul 2005 11:08:54 +0300, "Pantelis Giamarellos"
<[email protected]> wrote:

>?im Hi,
>
>I also fear that my friend's Disco V8 has a serious problem either with the
>general condition of the engine or the Efi or ignition system.
>
>Take care
>Pantelis


ICBW but I would have thought that a 50% loss of fuel economy would
show some fairly obvious performance losses or exhaust garbage as
well. It should pull smoothly and fairly strongly from as low as 1000
rpm without hesitation, and rev to 4500 through the gears.


--

Tim Hobbs

'58 Series 2 88" aka "Stig"
'77 101FC Ambulance aka "Burrt"
'03 Volvo V70
 
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Discussion Starter #7
On or around Sun, 03 Jul 2005 11:38:29 +0100, Tim Hobbs
<[email protected]> enlightened us thusly:

>On Sun, 3 Jul 2005 11:08:54 +0300, "Pantelis Giamarellos"
><[email protected]> wrote:
>
>>?im Hi,
>>
>>I also fear that my friend's Disco V8 has a serious problem either with the
>>general condition of the engine or the Efi or ignition system.
>>
>>Take care
>>Pantelis

>
>ICBW but I would have thought that a 50% loss of fuel economy would
>show some fairly obvious performance losses or exhaust garbage as
>well. It should pull smoothly and fairly strongly from as low as 1000
>rpm without hesitation, and rev to 4500 through the gears.


If you nail it, it should rev to about 5500...

--
Austin Shackles. www.ddol-las.fsnet.co.uk my opinions are just that
"Quos deus vult perdere, prius dementat" Euripedes, quoted in
Boswell's "Johnson".
 
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Discussion Starter #8
Tim Hi again,

To be frank with you I have not asked him about the general feel of the
engine but i will be asking him tomorrow when I speak with him again.

Take care
Pantelis

"Tim Hobbs" <[email protected]> wrote in message
news:[email protected]
> On Sun, 3 Jul 2005 11:08:54 +0300, "Pantelis Giamarellos"
> <[email protected]> wrote:
>
> >?im Hi,
> >
> >I also fear that my friend's Disco V8 has a serious problem either with

the
> >general condition of the engine or the Efi or ignition system.
> >
> >Take care
> >Pantelis

>
> ICBW but I would have thought that a 50% loss of fuel economy would
> show some fairly obvious performance losses or exhaust garbage as
> well. It should pull smoothly and fairly strongly from as low as 1000
> rpm without hesitation, and rev to 4500 through the gears.
>
>
> --
>
> Tim Hobbs
>
> '58 Series 2 88" aka "Stig"
> '77 101FC Ambulance aka "Burrt"
> '03 Volvo V70
 
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Discussion Starter #9
Austin Hi,
5.500 rpm sounds a bit high for the LR/RR V8.
But then again I am used to the Tdi in Landies and even 4000 rpm is way too
much for those lumps of iron (Tdi I mean)

Take care
Pantelis

"Austin Shackles" <[email protected]> wrote in message
news:[email protected]
> On or around Sun, 03 Jul 2005 11:38:29 +0100, Tim Hobbs
> <[email protected]> enlightened us thusly:
>
> >On Sun, 3 Jul 2005 11:08:54 +0300, "Pantelis Giamarellos"
> ><[email protected]> wrote:
> >
> >>?im Hi,
> >>
> >>I also fear that my friend's Disco V8 has a serious problem either with

the
> >>general condition of the engine or the Efi or ignition system.
> >>
> >>Take care
> >>Pantelis

> >
> >ICBW but I would have thought that a 50% loss of fuel economy would
> >show some fairly obvious performance losses or exhaust garbage as
> >well. It should pull smoothly and fairly strongly from as low as 1000
> >rpm without hesitation, and rev to 4500 through the gears.

>
> If you nail it, it should rev to about 5500...
>
> --
> Austin Shackles. www.ddol-las.fsnet.co.uk my opinions are just that
> "Quos deus vult perdere, prius dementat" Euripedes, quoted in
> Boswell's "Johnson".
 
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Discussion Starter #10
On Sun, 03 Jul 2005 12:48:51 +0100, Austin Shackles
<[email protected]> wrote:

>On or around Sun, 03 Jul 2005 11:38:29 +0100, Tim Hobbs
><[email protected]> enlightened us thusly:
>
>>On Sun, 3 Jul 2005 11:08:54 +0300, "Pantelis Giamarellos"
>><[email protected]> wrote:
>>
>>>?im Hi,
>>>
>>>I also fear that my friend's Disco V8 has a serious problem either with the
>>>general condition of the engine or the Efi or ignition system.
>>>
>>>Take care
>>>Pantelis

>>
>>ICBW but I would have thought that a 50% loss of fuel economy would
>>show some fairly obvious performance losses or exhaust garbage as
>>well. It should pull smoothly and fairly strongly from as low as 1000
>>rpm without hesitation, and rev to 4500 through the gears.

>
>If you nail it, it should rev to about 5500...


It doesn't like it though. You can feel it begging to change up after
4500, and someone (Badger?) said something once about it being quite
bad for the lifters as they pump up.... Or something....

After the new cam mine was noticeably happier to rev and felt OK up to
5000. There isn't much to be gained up there though - it doesn't seem
to produce much more power beyond the mid 4000's. Oddly the new cam
didn't seem to do anything for the fuel economy though, although there
was other buggering about for LPG done at the same time so it wasn't a
true comparison.

Back to the OP - are there are any visible problems such as erratic
idle, colourful smoke or misfiring? Does your friend live at the top
of a mountain - not joking, when I moved away from Sheffield (where
everything is on a steep hill) my Peugeot of the day used a lot less
fuel.







--

Tim Hobbs

'58 Series 2 88" aka "Stig"
'77 101FC Ambulance aka "Burrt"
'03 Volvo V70
 
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Discussion Starter #11
Tim Hi,

my friend lives next to the sea.
Higher altitude always means less performance or more fuel consumed in order
to produce similar performance.
It has to do with the oxygen in the air which reduces the higher you are.
Plain matter of life on earth.

I will ask my friend about how the engine feels in general and whether he
gets any smoke or erratic idle etc.

Take care
Pantelis

"Tim Hobbs" <[email protected]> wrote in message
news:[email protected]
> On Sun, 03 Jul 2005 12:48:51 +0100, Austin Shackles
> <[email protected]> wrote:
>
> >On or around Sun, 03 Jul 2005 11:38:29 +0100, Tim Hobbs
> ><[email protected]> enlightened us thusly:
> >
> >>On Sun, 3 Jul 2005 11:08:54 +0300, "Pantelis Giamarellos"
> >><[email protected]> wrote:
> >>
> >>>?im Hi,
> >>>
> >>>I also fear that my friend's Disco V8 has a serious problem either with

the
> >>>general condition of the engine or the Efi or ignition system.
> >>>
> >>>Take care
> >>>Pantelis
> >>
> >>ICBW but I would have thought that a 50% loss of fuel economy would
> >>show some fairly obvious performance losses or exhaust garbage as
> >>well. It should pull smoothly and fairly strongly from as low as 1000
> >>rpm without hesitation, and rev to 4500 through the gears.

> >
> >If you nail it, it should rev to about 5500...

>
> It doesn't like it though. You can feel it begging to change up after
> 4500, and someone (Badger?) said something once about it being quite
> bad for the lifters as they pump up.... Or something....
>
> After the new cam mine was noticeably happier to rev and felt OK up to
> 5000. There isn't much to be gained up there though - it doesn't seem
> to produce much more power beyond the mid 4000's. Oddly the new cam
> didn't seem to do anything for the fuel economy though, although there
> was other buggering about for LPG done at the same time so it wasn't a
> true comparison.
>
> Back to the OP - are there are any visible problems such as erratic
> idle, colourful smoke or misfiring? Does your friend live at the top
> of a mountain - not joking, when I moved away from Sheffield (where
> everything is on a steep hill) my Peugeot of the day used a lot less
> fuel.
>
>
>
>
>
>
>
> --
>
> Tim Hobbs
>
> '58 Series 2 88" aka "Stig"
> '77 101FC Ambulance aka "Burrt"
> '03 Volvo V70
 
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Discussion Starter #12
We get 200 miles per tankful. I have been to RPi and they checked everything
out but the only thing wrong was a split diapram in the bit on the side if
the dizzy. Must be the way I drive!

Richard


"Pantelis Giamarellos" <[email protected]> wrote in message
news:[email protected]
> People Hi,
>
> I would be extremely obliged if you could provide me with a rough figure
> of
> how many miles a 3.9 V8 engine Discovery could make on a fuel tank.
>
> A friend here in Greece gets around 200 miles (up to 230 occasionally) and
> I
> think this is pretty low.
>
> Take care
> Pantelis
>
>
 
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Discussion Starter #13
On or around Sun, 3 Jul 2005 16:25:48 +0300, "Pantelis Giamarellos"
<[email protected]> enlightened us thusly:

>Austin Hi,
>5.500 rpm sounds a bit high for the LR/RR V8.
>But then again I am used to the Tdi in Landies and even 4000 rpm is way too
>much for those lumps of iron (Tdi I mean)


well... looking in the books:

early RR V8 - peak power at 5000
later 3.5s - 4000 carb, 4750 injection.
3.9s - low comp 4550, high comp 4750.

official disco manual quotes max power at 5000, for a 3.5

but that's the peak power figure, not maximum permissible speed, which none
of the books seem to list.

--
Austin Shackles. www.ddol-las.fsnet.co.uk my opinions are just that
"Quos deus vult perdere, prius dementat" Euripedes, quoted in
Boswell's "Johnson".
 
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Discussion Starter #14
"Pantelis Giamarellos" <[email protected]> wrote in message
news:[email protected]
>
> People Hi,
>
> I would be extremely obliged if you could provide me with a rough figure

of
> how many miles a 3.9 V8 engine Discovery could make on a fuel tank.
>
> A friend here in Greece gets around 200 miles (up to 230 occasionally) and

I
> think this is pretty low.
>
> Take care
> Pantelis


Not had mine that long but half a tank got me to 95 miles easily,
probably do a 100 miles but don't really want to run out of fuel!!.

Dom J
 
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Discussion Starter #15
On Sun, 3 Jul 2005 17:14:30 +0300, "Pantelis Giamarellos"
<[email protected]> wrote:

>Tim Hi,
>
>my friend lives next to the sea.
>Higher altitude always means less performance or more fuel consumed in order
>to produce similar performance.
>It has to do with the oxygen in the air which reduces the higher you are.
>Plain matter of life on earth.
>


Well, to be pedantic the proportion of oxygen in the air doesn't
change much. However, the air is at lower pressure and therefore
there is a less mass of air (and hence oxygen) drawn in on each
stroke. Turbocharging helps substantially...


--

Tim Hobbs

'58 Series 2 88" aka "Stig"
'77 101FC Ambulance aka "Burrt"
'03 Volvo V70
 
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Discussion Starter #16
Tim Hi,

reduction of oxygen due to lower barometric pressure as altitude increases
was the main reason why turbochargers and superchargers were invited and
first applied in airplane engines, at least this is what the books write.

Richard and DomJ I guess for every two person quoting a proper fuel
consumption for a V8 two more exist quoting a fuel consumption of around 200
miles per tankfuel.
No wonder then that the V8 is considered a fuel thirsty engine by most.
But I think that 200 miles is a bit low for a 90 lt. fuel tank even if this
is done by an american designed 1960's engine.

-------

Forgot to also mention that my friend's engine has starting problems with
the starter turning OK but the engine not firing up on the spot.
Occasionaly, and usually when he is in a hurry, it may take up to 15 minutes
to fire up properly.

Take care
Pantelis



"Tim Hobbs" <[email protected]> wrote in message
news:[email protected]
> On Sun, 3 Jul 2005 17:14:30 +0300, "Pantelis Giamarellos"
> <[email protected]> wrote:
>
> >Tim Hi,
> >
> >my friend lives next to the sea.
> >Higher altitude always means less performance or more fuel consumed in

order
> >to produce similar performance.
> >It has to do with the oxygen in the air which reduces the higher you are.
> >Plain matter of life on earth.
> >

>
> Well, to be pedantic the proportion of oxygen in the air doesn't
> change much. However, the air is at lower pressure and therefore
> there is a less mass of air (and hence oxygen) drawn in on each
> stroke. Turbocharging helps substantially...
>
>
> --
>
> Tim Hobbs
>
> '58 Series 2 88" aka "Stig"
> '77 101FC Ambulance aka "Burrt"
> '03 Volvo V70
 
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Discussion Starter #17
On or around Sun, 03 Jul 2005 21:29:11 +0100, Tim Hobbs
<[email protected]> enlightened us thusly:

>On Sun, 3 Jul 2005 17:14:30 +0300, "Pantelis Giamarellos"
><[email protected]> wrote:
>
>>Tim Hi,
>>
>>my friend lives next to the sea.
>>Higher altitude always means less performance or more fuel consumed in order
>>to produce similar performance.
>>It has to do with the oxygen in the air which reduces the higher you are.
>>Plain matter of life on earth.
>>

>
>Well, to be pedantic the proportion of oxygen in the air doesn't
>change much. However, the air is at lower pressure and therefore
>there is a less mass of air (and hence oxygen) drawn in on each
>stroke. Turbocharging helps substantially...


This is why your engine runs best at low altitude, on a frosty dry day, and
worst at high altitude, in humid conditions in midsummer.

Doing a regular route on the same roads, you can actually detect the
differences that day-to-day weather changes make, even at the same altitude
etc.

--
Austin Shackles. www.ddol-las.fsnet.co.uk my opinions are just that
"Quos deus vult perdere, prius dementat" Euripedes, quoted in
Boswell's "Johnson".
 
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