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  #1  
Old April 18th, 2011, 11:32 PM
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Jeff Labbé
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Speed!

What's the real speed a 3 door 110 with a 200tdi mated to a LT77 on 1.4 gearing should do as top speed? My speedo doesn't agree with my gps. It reads 120km/h when the gps says 108-110km/h. I once got to 120ish km/h on the gps (while reading 130ish km/h on the speedo). I know they are not build for speed but.. Aren't they supposed to go at 130km/h ? Actually it does it on the speedo but, doesn't feel like it and the gps says it a little slower.. When I get on the highway it cruise at 100-105 km/h and it sounds as the engine is reving a bit high. When it get on an incline it drops to 85-90km/h. The engine starts on the button, doesn't smoke nor drinks oil. It pulls well (for a big rig) but need to be push for high speed, you need to be patient.. The brakes aren't dragging and the fuel consumption is somehow good (10-13 Liters/100km). Do you floor it to get to highway speed? Anyone? Don't get me wrong ; the truck is working fine. I use it everyday (only vehicle) for work and I do about +/- 40 000 km/year with it. But somehow it feels a bit slow. All those article I read about that 200tdi say it's a nippy, fast engine.. I must have a British Leyland union made one!
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  #2  
Old April 18th, 2011, 11:58 PM
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Doug Crowther
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you dont mention tire size.Are you sure its a !.4 tcase ? Those speeds and high revs sound like a 1.6
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  #3  
Old April 19th, 2011, 12:42 AM
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John B.
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I will assume and early LT77 and 32" tires, , I get.

107 km/h @ 3000 rpm
125 km/h @ 3500 rpm

So what you say sounds right. 120 km/h is 3360 rpm, which is about all you will get with a stock 200TDI. You can up fueling and boost to go faster, but higher gearing will help. The early LT77 has a "low" 5th gear at 0.83. Changing to the later boxes with 0.77 helps a lot or the 1.2 t. case. The 0.77 is the stock 5th for the 200TDi for a reason.

Edit... The nippy and fast comments. I'm not sure who in their right mind would say that... Especially stock they are slow by any standards. They can be tuned up to be nippy, but you need to tune them up.
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  #4  
Old April 19th, 2011, 12:45 AM
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Tony Lawson
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MOST I could get is 120kph with 33" tires (200tdi, lt77, 1.4 tcase). Normally 112kph on flats. Drop to 104kph if it even smelled a hill. This by the instrument which I believe read a few percent high.

Not nippy by any account
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  #5  
Old April 19th, 2011, 01:10 AM
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With 33 inch tires, swapping to 4.11 r&P and a 1.2 xfer box will get you back very close to the stock gearing with a 1.4 and 750-16's. That would help the 200TDi grunt out a few more KPH and make the hills a it easier, but realistically, a 200TDi 110 is not a fast ride. Leave early, enjoy the scenery.
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Old April 19th, 2011, 08:24 AM
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3 door 110 300tdi 1.4 r380 33" tires 2700rpm @ 70mph has to be pushed to go faster and egt's climb quickly.
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  #7  
Old April 19th, 2011, 08:17 PM
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Jeff Labbé
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Doug, I should have mention the tire size as this change the gearing.. It wears 235/85r16 and the gearing on the T-case is a 1.4 I had a 1.2 disco unit and a military 1.6 unit. After not being satisfied with both I email M. Ashcroft to get what was needed to change the gearing to a proper 1.4 defender unit. So the disco t-case was rebuilt to a 1.4 but I must admit the tranny (LT77) is of an early type so the gearing on 5th is short. I thought about GKN overdrive to make it quieter and more economical but surely not faster..Nippy and fast is from old Land-Rover owner magazine from th 90's. But somehow I think it should pull up a bit faster, I did tweak a bit the pump and the turbo but I don't want to guess to much as I have no boost pressure gauge nor a EGT. By the way, Tony I leave early and enjoy the ride.. More then 2 hrs of joy ride every day!

I had a series III with the 2.25 petrol before.. The 200 tdi doesn't feel that much more powerful, I mean acceleration coz, torque wise it is a beast...
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Old April 20th, 2011, 12:03 AM
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John B.
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So get an EGT, what are they $60 for the nice digital ones and a boost gauge, another $30....

I can sit at 120 km/h all day comfortably with the 1.2 and early LT77 but it is hard on fuel at that speed. Top speed is around 140 or so.
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  #9  
Old April 20th, 2011, 07:13 AM
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Jeff Labbé
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The problem I had with that set up (1.2) is the lack of pulling power in first. I use the 110 for my work (forestry) and the vehicle is often loaded. Tewkesbury is a small town in the mountains so it's always up hills! But John you're right about the cruising speed, it is more comfortable for long ride. I did a tripp for work going to Toronto (10-11 hrs drive) and it was cheap on fuel at 100-110km/h. It returns about 9-10 Liters/100km. Anyone has tried GKN overdrive? It remembers me the old series type overdrive, with a little more up to date electric action.
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  #10  
Old April 20th, 2011, 08:14 AM
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John B.
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I understand. I do have a military box with the lower 1st and that helps.

Personally I think your best choice is to get the LT77 from a 200TDI with the .77 5th or a short bellhousing R380.

For overdrives, the Roverdrive is probably the best choice. It is a big reduction, so I suspect there would be a lot of driving in 4th OD. http://www.roverdrives.com/ds_model.html
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