Saturday, Nov 25, 2006 at 02:14
Hi Charlie,
I previously owned an 80 series 1HZ 4.2 cruiser and then upgraded to a 3.0TD GU. I also did a lot of towing of my camper van (also 1600kgs) so have owned and towed a similair size load (click on my rig pic below to see)
Now while the 1HZ did the job, it was S..L..O..W and averaged over 17.5l/100kms while towing (12.5 l/100kms around town solo). I used to sit on 100 km/hr but any incline would knock that back pretty quickly. I remember one time heading into a strong head wind near
Geraldton and I couldn't get over 80 km/hr on the flat road. I then added a 2 1/2" system and extractors. Now this made a difference (estimate 10-15%) but still slow.
Then I bought the 3.0TD GU. You cannot compare the two when towing, the difference is that much!!! Hills that were 3rd gear in the cruiser were now 5th in the GU. Note that I have added a Dtronic so i have 420Nm of torque at 2,000rpm. The cruiser has 272Nm so its no suprise that the extra 148Nm in the GU makes one heck of a differnce. Thats 4Nm more torque than the V8 100 series cruiser!!!. Fuel economy is just over 15L/100kms when towing so not only can you stick at 100 km/hr up the hills, you get better economy.
The other thing is overtaking, something I virtually never did in the 1HZ. Any overtaking required a long straight stretch. Now in the 3.0TD GU I was regularly overtaking and could reach 140 km/hr, something that the 1HZ couldn't even dream of (note - I do not condone these speeds when towing, but they can be achieved if required).
Now dinasours like Roachie don't have much time for the GU 3.0TD (and early models certainly had more than their fair share of problems) but I reckon the series III or later 3.0TD's are as reliable as any vehicle on the market. While the 1HZ has a proven track record, they are old technology and are fuel inefficient and power deficient in comparison to the high tech diesels.
But to balance the comparison, the 1HZ was in its element in low range first gear tracks at idle. It has oodles of torque at very low revs and I cannot think of a better engine for this type of work. But put it on a beach or soft sand where power is everything and the 3.0TD will simply blow it away, there is no comparison. Even with a Dtronic, the high tech, small capacity diesels achilles heel is very low revs. At these speeds they are a low compression (17:1 vs 22:1) small motor without the turbo spooled up to breath enough air. Also engine braking is not as good, simple maths says a smaller lower compression engine cannot be as good.
Now if you are like me, unfortunately we spend 90% of out time driving on the blacktop dreaming about being in 4WD. The point is that as a daily driver the 3.0TD easily keeps up with traffic and still gets 11 l/100kms whereas the 1HZ is simply a slug.
If I had my time again, I would not change a thing. I reckon the 3.0TD is the best compromise for what I do and if you have a simliar situation then I can recommend this from experience - not the usual hearsay and bias that you often read in forums :)
Cheers
Captain
AnswerID:
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