The D2 Lowdown

Can someone please tell my 02 D2 manual V8 that is doesnt have the torque to skull drag my 21 Seafarer Vagabond - 2 tonn with dual axle trailer. It tows nicely. Perhaps it is the manual, but then again my 95 V8 auto does pretty well towing the beast also...

Cheers

PS. V8s are good for towing...they have 3 pots more than the diesel and dont rely on a hair dryer:) To be clearer the 4.0 V8 has 340nm of torque at 2,600rpm and the TD5 has 300nm at 2000 rpm...at 2000 rpm the V8 is probably close to 300nm but of course has 40nm more to play with only another 600rpm on board and 31kw more at about the same difference in rpm - ie about 700rpm higher in the rev range.

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Originally Posted by ozscott

Can someone please tell my 02 D2 manual V8 that is doesnt have the torque to skull drag my 21 Seafarer Vagabond - 2 tonn with dual axle trailer. It tows nicely. Perhaps it is the manual, but then again my 95 V8 auto does pretty well towing the beast also...

Cheers

PS. V8s are good for towing...they have 3 pots more than the diesel and dont rely on a hair dryer:) To be clearer the 4.0 V8 has 340nm of torque at 2,600rpm and the TD5 has 300nm at 2000 rpm...at 2000 rpm the V8 is probably close to 300nm but of course has 40nm more to play with only another 600rpm on board and 31kw more at about the same difference in rpm - ie about 700rpm higher in the rev range.

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Unless of course you chip the TD5.... in which case you have more torque than the V8 AND fuel economy ;)..

I do miss my V8.. really I do...:p

Mark

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Originally Posted by ozscott

PS. V8s are good for towing...they have 3 pots more than the diesel and dont rely on a hair dryer:) To be clearer the 4.0 V8 has 340nm of torque at 2,600rpm and the TD5 has 300nm at 2000 rpm...at 2000 rpm the V8 is probably close to 300nm but of course has 40nm more to play with only another 600rpm on board and 31kw more at about the same difference in rpm - ie about 700rpm higher in the rev range.

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Sorry to spoil the party....the 03,04auto td5 disco has 340 nm of torque,the manual i think,315nm,both around 2000 rpm.
dont know what the torque curves look like,but they are also important and would give a good idea of engine performance.

I reckon they are probably as good as each other for towing,just the diesel will use less fuel

I was comparing the actual stats for my year - 02 complianced last of the rectangle headlight models in manual form.

As for chipping...well yeah but how much can a TD5 handle; they are already a tiny motor with a bloody great blower on them! Longevity wise I reckon unchipped would be better but each to their own. Oh and you cannot increase power in a TD5 or any engine without feeding it more combustible stuff...ie if you use those extra kws you use more diesel.

As for torque curve the V8s pretty damn good (there are heaps of Vs around that are not...eg the LS1 6.0 Chevs in the commodores that had max torque at about 4800rpm and the current D3 4.4 Jag V8 that has max torque at about 4400rpm...the old Disco motor was good for torque off idle and the point where the max comes in shows how flat the curve would be and where it is likely to really kick in from. The TD's 20 off to 1 compression gets good torque off idle.

As for them being about the same, particularly in chipped form...I reckon your spot on:) (I was just reacting to Redback and his recommendation to get the TD because the V8 didnt have the torque to tow....it has the torque and the talk).

Cheers

Thanks for the pointers folks - what a pity ya can't get the V8 "acoustics"
with the TD5 apetite! Going to look at a couple of 2003 TD5's on the
weekend.

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Originally Posted by ghoti

Thanks for the pointers folks - what a pity ya can't get the V8 "acoustics"
with the TD5 apetite! Going to look at a couple of 2003 TD5's on the
weekend.

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my experience with a manual td5 defender, with chip and exhaust and running 20pounds of boost in a modified car.....

starting off from a stop has always been a bit interesting with a big load on the back or on steep hills, have to slip the clutch a fair bit to get her going as the TD5 doesn't really seem to have buckets of power until its on boost.

that has meant that when i drive the TD5 i need to be wary of this however slipping the clutch to get her going can become quite tiresome.

once its on boost its an amazingly powerful motor... esp considering its moving a very large car with lots of aftermarket accessories around...

i havent towed anything too large with the td5 yet, but i would expect there would be a bit of an art to getting the thing off the line with a few tonne behind it.

an auto would be very advantageous in this situation....

the v8 disco 2 i own just has power straight off from idle which makes towing and low range driving in things like snow, a bit easier...

my 2 cents...
andrew

I have an 01 TD5, owned from new. Has been fantastic, serviced every 10,000kms. Only 2 major issues with it - faulty boost controller and a new MAF sensor. I would go for an updated version 03/04 model as it has the CDL installed. TD5 or V8 - that is a personal issue.
Worse thing about mine is I enjoy it too much, and can not think about parting with it.

at idle or just off idle any LR V8 will eat any LR diesel.

add 1000rpm and everything changes though,,,

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Originally Posted by Pedro_The_Swift

at idle or just off idle any LR V8 will eat any LR diesel.

add 1000rpm and everything changes though,,,

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thats it and unfortunately between 1000 and 2000rpm there is a bit opportunity for it go THUNK and stall :P which i unfortunately do every now and then in the TD5 :)

For what it is worth, my 1999 V8 Auto D2 was great at pulling a 1.4 tonne camper, but not really up to pulling our new 2.5 tonne van. It could pull it, but it was working too hard, and was not pleasant on any sort of hill. I dropped 2 cylinder liners a few weeks ago (no 5 and no 8) and as a result replaced the engine with a factory new 4.6. Now it has adequate power for the 2.5 tonne van - currently in SA on a trip from Canberra. The van is pretty high since it is a dirt roader and full size (not a pop top).

We tried different speed and gear combinations for interest sake on the 1000 km trip across. Fuel consumption varied from 32 litres per 100km with a brand new tight motor in third at around 95 kph to 28 litres per 100 km in third at 85 kph. On a smooth freeway it can just about hold 95-100kph comfortably in top on the level, and give 28 litres per 100 km, but add some undulations (typical roughish bitumen highways) and it just can't do it in top at those revs. Our normal cruise with the van is 85 kph in third which is safe, comfortable and not quite so expensive. Without the van, touring in the Adelaide Hills it has given us between 12 and 14 litres per 100 km, typically at 85-90 kph with frequent slowing and accelerating for the tight corners here (often down to 45 kph recommended).

Temperature never rises above about 96 degrees even on steep hills as long as the speed is reasonable. Around town, in stop start traffic it gets up to around 100 degrees.

In our experience, the 4.6 is a far superior engine to the 4.0 in every respect. Smoother and actually has some torque!