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4.2 Diesel GRX

Re: 4.2 Diesel GRX

Postby Alex Roux » 09 Dec 2015 13:17

SJC wrote:I am not too desperate to buy, so we might just be a good match. :lol: :thumbup:

Is this the same Patrol that you have mentioned on another thread before? (sorry cant find it now).


Yes,
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Re: 4.2 Diesel GRX

Postby SJC » 09 Dec 2015 14:40

Do you know how much your friend want for it?
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Re: 4.2 Diesel GRX

Postby Clem » 09 Dec 2015 17:03

Thank you Cedric. So, in summary then, it is a much bigger, stronger and more capable version of the 2.25 naturally aspirated diesel I already have in a Series Land Rover; a wonderful car to drive but certainly not for either the fainthearted or anyone in a hurry. Yet, in off-road conditions and heavy sand it does come into its own. That is, if you can survive the heat in the cabin… :-)

I think I will stick with my 4.8! :-)


ricster wrote:Clem, being serious, what SJC said (Only a TD42 owner would understand..) is also a somewhat serious point. The 2 vehicles are so different that it is like oil and water. The petrol motor ( and I can only speak from a 3.0 V6 Sani ) is an amazing machine. The sound is incredible, the power delivery and the rev range is exhilarating. There is a "manly" sense of brute power that even for a mild temperament guy is like a drug. Soft sand driving is a breeze as is basically all other types of driving conditions.

You know your driving style, now with a diesel its totally different. Yes speed between a 4.8 and a 4.2 diesel is different, although saying that I have sometimes pushed mine to just under the 170Km/h mark.( I know ....hard to believe :lol: ) and it takes a little longer to get there than a 4.8 would. Overtaking is a more planned event. The 4.2 gearbox is a brute, but if you are doing 70Km/h ( revs at +/- 1300rpm ) in 4th and you want to accelerate quickly slapping it into 3rd is going to push the revs up into +/- 3100rpm. Besides the motor ( bear in mind its an old school design motor ) sounding like it wants to climb out the body due to the fact that you are about to reach MAX revs, you only have about 500 revs to play with and the power curve is going to get less as the revs climb ( peak torque and Kw is at around 2800 - 3000 depending to fueling/turbo setup ). Keeping it in 4th gear will get going but takes a little time as the turbo starts spooling up.

Speaking of spooling up of the turbo..... you thought a 6 cylinder petrol motor sounds beautiful.... A slight turbo whistle when idling, and a turbo air dump out the exhaust on gear changes can give a man some tingling sensations in some delicate areas.....hahahaha. You feel like a kid racer in a 3 ton chunk of iron .....hahaha.

Driving style in a diesel is very different to a petrol, one is a lot more aware of the gauges ( especially EGT gauge ). this for the only reason being that there is a turbo on a motor that never came out standard with a turbo. BUT having said that, I believe that even a factory designed turbo diesel vehicle of ANY manufacturer should have some sort of an EGT gauge fitted. Its like having toilet paper in a bathroom ( excuse the analogy ).

Fuel consumption....hmmm... that depends on how you drive it. 4.2 diesel will be better if you drive nicely. Push it between 130 and 140 and you will use 15 - 16L/100km ( tyre/roofrack/suspension etc etc dependent ). At 120km/h mellow driving 14L/100Km is achievable. The 4.8 on the open road is probably marginally heavier. I do a LOT of town stop start driving and is my daily drive and I average 17-18L/100Km. Here I think the 4.8 would be at its second worst consumption, with soft sand driving being its worst. Here the diesel can save a little dignity on the soft sand. Obviously excluding dune charging, but more general, for example the amazing road from Kozi Bay Border Post to Ponta do Ouro, my diesel will get better fuel consumption. In fact on the river trip that we went on a few months back, I was astounded on how well the diesel did on fuel consumption, and I was in 4x4 low for a lot of the time and should have deflated my tyres a lot more than what I did.

Services... well due to the old school technology the 4.2 diesel has to get an oil change every 5000km. This is a cheap service and is really not a difficult thing to do ones self. Petrol services are ( I stand corrected here.....) 10 000Km??

4.2 diesel motors can really run on just about anything. Probably even a jug of paraffin and a bottle of 2 stroke. Naturally not the best thing to run the motor on, but in a pinch a plan can be made.

Electronics?.... in the 4.2 diesel... what electronics? ( again bear in mind I'm talking about the standard GL, which was the only version the GU 4.2 diesel came out as )The most advanced thing is probably the digital odometer. There is no computer, no ECU, no buggerall. There is basically a wire to the starter motor and a wire to the diesel pump to open a solinoid to allow diesel to flow. That's it !! Yes there are electric windows etc, but nothing that can leave you stranded in the bush. When I burnt a hole through my No 2 piston just after buying my Patrol I still drove it back home ( 550Km ) from Botswana to Alberton. Yes I used a lot of oil and it smoked like Mount Vesuvius on eruption day, but I drove home......

So summing up... they are two completely different beasts, and both should be respected for what they are and can achieve. To judge them against each other is almost a little unfair to both vehicles due to them being so different. One will out perform the other in certain aspects and visa versa. But both are incredible examples of comfortable overlanding 4x4 vehicles.
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Re: 4.2 Diesel GRX

Postby Alex Roux » 09 Dec 2015 17:20

ricster wrote:...
4.2 diesel motors can really run on just about anything. Probably even a jug of paraffin and a bottle of 2 stroke. Naturally not the best thing to run the motor on, but in a pinch a plan can be made.


Just don't add water to the mix!.....
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Re: 4.2 Diesel GRX

Postby Peter Connan » 09 Dec 2015 17:30

There have been several tongue-in-check attempts on this forum to "prove" which is better between Petrol and Diesel.

The only thing we have managed to prove is that if you want to drag race in a river-bed, buy a 4.8, and if you want to do a rally stage, buy a GQ and stick a 4.5 in it. Oh and if you have to climb steep slopes with amputated feet, then buy a 3l Diesel.

The only competition the 4.2 TDI's have won so far is "who can sound most like a 75 tonne truck".

:rolling: :rolling: :tease:
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Re: 4.2 Diesel GRX

Postby Peter Connan » 09 Dec 2015 17:35

More seriously, the advantages of the 4.2 TDI are about 2l/100km lower consumption and a vehicle that is probably easier to rock-crawl in. This is offset by higher maintenance costs and a less responsive vehicle.

If you consider keeping this car un-turbo'ed, and assuming the engine work was done well, you will have a slow car that is the undisputed epitome of vehicular reliability.
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Re: 4.2 Diesel GRX

Postby Clem » 09 Dec 2015 17:42

Indeed Peter, but it is not like the 4.8 has reliability issues either; certainly no significant ones. As for the fuel consumption issues, one does not buy a 4.8 in the first place if that is your biggest concern.
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Re: 4.2 Diesel GRX

Postby Peter Connan » 09 Dec 2015 17:51

Clem wrote: As for the fuel consumption issues, one does not buy a 4.8 in the first place if that is your biggest concern.


Or any patrol for that matter I think? They are and will always be thirstier than lighter vehicles with more highly-strung cutting-edge engines.

It's the price we pay for reliability and arguably ability.
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Re: 4.2 Diesel GRX

Postby Alex Roux » 09 Dec 2015 20:28

Peter Connan wrote:...Oh and if you have to climb steep slopes with amputated feet, then buy a 3l Diesel....


I must have missed an episode? :think:

Did Oscar buy a 3d? Or what happened?
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Re: 4.2 Diesel GRX

Postby SJC » 09 Dec 2015 22:07

Peter Connan wrote:The only competition the 4.2 TDI's have won so far is "who can sound most like a 75 tonne truck".

:rolling: :rolling: :tease:


Sounds like a good enough reason to own one. :thumbup:
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