okay still looking for a tow rig. would like some opinions on a 96-8 discovery (suits my budget and discos seem to have gotten an update in 96?). i managed to convince my parents and girlfriend based on the high levels of mod cons.
i was pretty much set on an v8 auto. but just wanted to ask about the tdi2.5... how does the v8 auto compare to the tdi2.5? is auto or manual better for the diesel engine?
i want a tow rig that is fuel efficient (if that's possible!). i don't need to win races but i don't want to be in 2nd gear to go up a hill. what do you all think?
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3.9 v8 vs tdi2.5
Moderator: Micka
If you want decent economy get a tdi unless you can find a V8 on gas. If you get a tdi, definately go auto as it hides its lack of off-boost performance. With a few small tweaks to the fuel pump, a tdi can be made to perform pretty well.
Tdi's get around 10l/100kms in most conditions and doesn't get much worse when towing. A petrol V8 would get between 16-30 l/100kms. Keep in mind though that diesel is quite expensive at the moment so total different in cost is not as big as it used to be.
Tdi's get around 10l/100kms in most conditions and doesn't get much worse when towing. A petrol V8 would get between 16-30 l/100kms. Keep in mind though that diesel is quite expensive at the moment so total different in cost is not as big as it used to be.
Range Rover - 4.4 V8, MD Crawler Box, F&R Lockers, 35" Centipedes, 4" lift. Overqualified WebWheeler!!!
Discovery - Bling touring stuff!
Discovery - Bling touring stuff!
In a nutshell,
Screw smoke adjustment screw in to increase fuel at no boost - better off line and boost will build sooner.
Rotate diaphram to increase fuel over range.
Ajust star wheel underneath diaphram so that fuel increases quicker as boost rises.
Screw in maximimum fuel rate screw to increase fuel at full load/boost
In some cases remove the spacer under the diphram to increase stroke of fuel pin.
Be warned: Do this in increments and test at each to avoid overfuelling, which will create dangerously high exhaust gas temps. The maximum fuel rate screw has most potential for extreme temps.
You will probably have to adjust the idle speed screw. Do not adjust the maximum speed screw.
This is well documented in the technical section of the land rover enthusiest forum, but you have to wade through many posts that may be confusing. I can email a document based on the good info extracted from there.
Best to go through your intake, turbo and exhaust systems to maximise the amount of air 1st. More air allows more fuel. Adding fuel without increasing air increases exhaust gas temps.
Screw smoke adjustment screw in to increase fuel at no boost - better off line and boost will build sooner.
Rotate diaphram to increase fuel over range.
Ajust star wheel underneath diaphram so that fuel increases quicker as boost rises.
Screw in maximimum fuel rate screw to increase fuel at full load/boost
In some cases remove the spacer under the diphram to increase stroke of fuel pin.
Be warned: Do this in increments and test at each to avoid overfuelling, which will create dangerously high exhaust gas temps. The maximum fuel rate screw has most potential for extreme temps.
You will probably have to adjust the idle speed screw. Do not adjust the maximum speed screw.
This is well documented in the technical section of the land rover enthusiest forum, but you have to wade through many posts that may be confusing. I can email a document based on the good info extracted from there.
Best to go through your intake, turbo and exhaust systems to maximise the amount of air 1st. More air allows more fuel. Adding fuel without increasing air increases exhaust gas temps.
John
I guess I should give the v8 story.
Tdis are high torque rise engines ie the torque band is like a tall mountain. This means that on steep hills you have to keep it in the torque band with rapid shifts or sloooooww. Once you lose momentum, you are in second crawling. BUT Australia is pretty flat except for the Eastern seaboard. I remember a brand new Nissan 3 litre all over me along the Mudgee road , we got to a long steep hill and were baulked by a slow car down to say 75 Kmh. He was stuffed, I just sailed past in kickdown and regained 110 KMh half way up the hill. he took Ks to overtake me even though he was trying to go much faster than me. I was not baulking him.
A V8 has the ability to actually overtake, by changing down and using revs which are not available in diesel.
However if you want economy forget V8 but nothin is for nothin. You would probably get good economy in a V8 if you go as slow as a diesel.
I get 14l per 100Kms at 110 to 115 on the cruise, but my 3.9 is dynod etc. Towing somthing moderate I believe the economy not too bad, say 18-20, but over say 1 tonne it starts to drop.
I am sure the old duffers in the caravan parks all swear by diesel. A friend sold his 4.8 Patrol petrol for a 3litre diesel because all the duffers told him diesel is the go. Probably dropped $ 10,000 in taxes, depreciation etc. Buys a lot of petrol.
regards Philip A
Tdis are high torque rise engines ie the torque band is like a tall mountain. This means that on steep hills you have to keep it in the torque band with rapid shifts or sloooooww. Once you lose momentum, you are in second crawling. BUT Australia is pretty flat except for the Eastern seaboard. I remember a brand new Nissan 3 litre all over me along the Mudgee road , we got to a long steep hill and were baulked by a slow car down to say 75 Kmh. He was stuffed, I just sailed past in kickdown and regained 110 KMh half way up the hill. he took Ks to overtake me even though he was trying to go much faster than me. I was not baulking him.
A V8 has the ability to actually overtake, by changing down and using revs which are not available in diesel.
However if you want economy forget V8 but nothin is for nothin. You would probably get good economy in a V8 if you go as slow as a diesel.
I get 14l per 100Kms at 110 to 115 on the cruise, but my 3.9 is dynod etc. Towing somthing moderate I believe the economy not too bad, say 18-20, but over say 1 tonne it starts to drop.
I am sure the old duffers in the caravan parks all swear by diesel. A friend sold his 4.8 Patrol petrol for a 3litre diesel because all the duffers told him diesel is the go. Probably dropped $ 10,000 in taxes, depreciation etc. Buys a lot of petrol.
regards Philip A
Had a 97 tdi with auto, excellent combo, and we used it for towing 1.6 t trailer and never missed a beat. As long as its got its service history i would choose the tdi- more economical than v8, no electrics to fail, alternator, dizzy, more life out of it, plenty of spares for both engines. if your going near water diesels the go, round town we returned less than 10 L/100km with air cond, either way would recommend disco than any other vehicle in the price and age range for features and technology
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