Fuel consumption for Disco1 3.9 and 300TDI

Land Rover Discovery 1, 2 and 3

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Fuel consumption for Disco1 3.9 and 300TDI

Postby hgb-560sel » 10 Feb 2010 06:12

Good morning guys

I am new to this forum. My name is George Bosch and I have been collecting and restoring classic cars for the last 36 years.

I am currently in the process of evaluating the purchase of a Discovery. My experience with matters electronic points me more in the direction of a Series 1 Disco.

Can I please get some advise regarding fuel consumption to be expected. In the early 70's I used to have a Rover P5b Coupé ("Elephant") or in UK also known as the poor man's Bentley. So I am fairly comfortable with the Rover V8. What concerns me is the weight of the Disco and some rumours of very high fuel consumption on the V8 models.

So I would appreciate some solid advise on both V8 and 300TDI.

Thanking you in advance

George
with kind regards
George

2003 RR Vogue Td6
2005 LR Disco3 TDV6 S
1955 MB 300SL W198/I
1988 MB 500SL R107
1991 MB 500SL R129
2001 MB SLK 32 AMG
1954 Rolls Silver Dawn (Countryman Saloon)
1958 Porsche 356A Coupé
1979 VW Beetle Cabrio (Karmann)

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Re: Fuel consumption for Disco1 3.9 and 300TDI

Postby Pumba » 11 Feb 2010 07:51

Hi George,

I have had the pleasure of owning both TDI and 3.9i Disco 1.

TDI - mixed travel to work that includes highway at 120km/h and backroads at 80, with being stuck in town = 9 km/l
V8i - mixed travel to work that includes highway at 120km/h and backroads at 80, with being stuck in town = 5 to 6 km/l with AirCon on

TDI - travelling 280km towards Lydenburg at 110 to 120, including mountain passes etc = 9.5 to 10.5 km/l
V8i - travelling 280km towards Lydenburg at 110 to 120, including mountain passes etc = 6.7 to 7.5 km/l with AirCon on

The V8i is rumoured to give close to 10km/h when cruising at 90km/h - I am yet to try this!

The V8 is nicer to drive, nice acceleration and can cruise at a much higher speed, and is a lot quieter inside.
The cost of fuel must be seen in context of cost of maintaining the TDI - repalce the turbo once and the year's saving in fuel is wiped out.

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Re: Fuel consumption for Disco1 3.9 and 300TDI

Postby camelman » 11 Feb 2010 10:24

George, I had a 3.9 Automatic. Most of the time it carried a roofrack and rooftop tent, which made it heavy in town - 4-5km/l. On long overland trips, loaded to the hilt, it averaged about 5,5km/l. Wonderful car though, easy to drive and maintain, and man, that sound of the V8 was just music!
camelman
'95 Discovery V8i Auto (now sadly sold, with fond memories)
'04 Discovery Td5 GS

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Re: Fuel consumption for Disco1 3.9 and 300TDI

Postby hgb-560sel » 12 Feb 2010 00:21

Hi guys, thank you very much for the detailed replies. That is precisely the info I was looking for. I drive a Mercedes 560SEL everyday and therefore am used to 18lt/100km :roll: in town. But the vehicle will be for the wife who will use it to commute between work and home ca 50km/day. Also to be used for offroad trips.

I will most probably look for a good 300TDI, preferrably in ES version. ;)

George
with kind regards
George

2003 RR Vogue Td6
2005 LR Disco3 TDV6 S
1955 MB 300SL W198/I
1988 MB 500SL R107
1991 MB 500SL R129
2001 MB SLK 32 AMG
1954 Rolls Silver Dawn (Countryman Saloon)
1958 Porsche 356A Coupé
1979 VW Beetle Cabrio (Karmann)

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Re: Fuel consumption for Disco1 3.9 and 300TDI

Postby greenskyben » 12 Feb 2010 12:29

Hi, I have a Disco 1 Tdi ES, and its awesome! Has everything you need to make you comfy, but there are more things that can go wrong, motorised seats and their swiches for example can be costly/difficult to repair. Otherwise I love it! I use it everyday around town, and play most weekends and average about 8,5 km/l. Quite slow up hills on the highway though, and even slower with the aircon..., but good fun all the same.
If you look around you could get a bargain too! I got mine in November for R48k with 200000km on the clock, new BFG's and in very good condition.
Good luck!
'98 Discovery ES Tdi

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Re: Fuel consumption for Disco1 3.9 and 300TDI

Postby hgb-560sel » 06 Apr 2010 19:08

Hi guys

I have bought a 300Tdi disco1 ES Manual. Have suitably modified it with a few breathing enhancing tricks and it now outaccelerates a Td5 Manual.

I am currently getting around 900km to a (standard) tank fuel.

Thanks for all the advice. It helped me source the right vehicle

George aka hgb-560sel
with kind regards
George

2003 RR Vogue Td6
2005 LR Disco3 TDV6 S
1955 MB 300SL W198/I
1988 MB 500SL R107
1991 MB 500SL R129
2001 MB SLK 32 AMG
1954 Rolls Silver Dawn (Countryman Saloon)
1958 Porsche 356A Coupé
1979 VW Beetle Cabrio (Karmann)

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Re: Fuel consumption for Disco1 3.9 and 300TDI

Postby label factory » 07 Apr 2010 01:28

im new here, can you give me some advice?

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Re: Fuel consumption for Disco1 3.9 and 300TDI

Postby hgb-560sel » 07 Apr 2010 07:21

label factory wrote:im new here, can you give me some advice?


Welcome to the forum!

here is what I did:

1. Removed EGR valve (done by LandyOnline)

2. Removed Cat and centre muffler and fitted high flow muffler (de Graaff in Codonia Ave, Gezina)

The above two points aid in better response of the turbo, starts beeing effective from 1500rpm!

3. Fitted Allisport OEM replacement Intercooler (50% more cooling)

4. Fitted ITG air filter (same filtration as paper but much higher flow, replace after 150'000km)

5. Adjusted fuel flow to suit higher airflow (very little adjustment needed, do not try yourself or YOU WILL destroy the motor!

6. Fitted EMS1 monitoring system with EGT probe. This is very important as it will give ample warning when something starts getting too hot.

I trust this helps


George

It is most important to drive with the standard size tyres 235/70 R16. Going for bigger rubber screws up the ratios and results in some astronomical fuel bills. i.e. 11.5 - 12.5lt / 100km.
with kind regards
George

2003 RR Vogue Td6
2005 LR Disco3 TDV6 S
1955 MB 300SL W198/I
1988 MB 500SL R107
1991 MB 500SL R129
2001 MB SLK 32 AMG
1954 Rolls Silver Dawn (Countryman Saloon)
1958 Porsche 356A Coupé
1979 VW Beetle Cabrio (Karmann)

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Re: Fuel consumption for Disco1 3.9 and 300TDI

Postby Pumba » 09 Apr 2010 06:53

Excellent George! Thats about the same I did to my old TDI (which we swapped later for a V8i), as well as to my Isuzu 250 DC. Its the same as what the guys at SAC would do, but you're saving about 80% by doing it yourself.

One point though: do not trust those fancy high-flow air filters. Ask Jim at Landyonline how a filter like that almost Malema'd-up his engine. I drive 4 kms of dirt road every day, and have to replace the std filter every 2 months. The high-flow filter does let through very fine dust particles, and this is like sandpaper to the insides of the engine. They are fine to use on tar roads only, but if any form of gravel road is involved there will be a problem...

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Re: Fuel consumption for Disco1 3.9 and 300TDI

Postby hgb-560sel » 11 Apr 2010 22:31

Hi Pumba

I agree with your airfilter statement as far as the K&N filters are concerned. Those are not suitable for gravel or off road use. I am using the ITG filter, which has the same dust retention capability as a paper filter, but with much higher airflow capabilities.

I am using K&N filters with great effect on my MB 560SEL, the R129 500SL and my 1955 300SL.
I had one in a 230TE for 180000km of driving without any increase in oil consumption or smoking.

When going on long trips with off rôad driving, I will still use a paper filter. That is to save the ITG filter and also to minimize the hazard of the engine sucking in water when wading.
with kind regards
George

2003 RR Vogue Td6
2005 LR Disco3 TDV6 S
1955 MB 300SL W198/I
1988 MB 500SL R107
1991 MB 500SL R129
2001 MB SLK 32 AMG
1954 Rolls Silver Dawn (Countryman Saloon)
1958 Porsche 356A Coupé
1979 VW Beetle Cabrio (Karmann)


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