Noise Level

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Ok....thanks a lot, I thought that the Unit Injector System was the loudest, I know that Common Rail is the quitest motor but from your answeres it depends more on the quality of the sound-proofing how loud it is inside the car. I have heard of mats that are permeable to air but also insulate the sound, I think I will try them. But first I have to get rid of the rust in footwell. :(
 
flat said:
bastard heavy though, i have a it of ex-NCB belt dated 1988 about 2.5m long and its outrageously heavy! Great as a huge mat on the floor!
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Good sound insulator, but you're right it's heavy. For me, the issue is the number of suit cases that pile up! :rolleyes: :p
 
Remember the Tdci models had higher ratio transfer boxes from the factory than previous versions which accounts for a great deal of the extra refinement, along with better soundproofing.

You can achieve the same thing on earlier models by fitting a different transfer box or fitting an overdrive. My 200Tdi 90 was base spec when I got it but I’ve added extensive soundproofing and an overdrive and can now cruise comfortably at 70+ without excessive noise. Can’t say the same for the fuel consumption though! :D
 
I thought Tdci had the same transfer box. They do have a 6 speed.

And yes you can quieten down a Tdi. But they will always be unrefined and noisy. You notice this when you get in a non Tdi Land Rover.

Even a Tdi Discovery is no where near as refined and quiet as a V8 one. And a standard Disco has way better sound proofing and NVH than even the most heavily home spun Defender setup.
 
It’s a 1.2 box in the Tdci. Hence the 6-speed gearbox, the extra low first makes up for the higher ratio transfer box.

Absolutely a Tdi-powered Land Rover will always be less refined than a V8, or even an earlier indirect injection diesel one. An early Discovery is just a Defender with a better-built body on top and will easily do 90% of what the Defender will do just in more comfort. Its a shame the bodywork rusts so badly.

The reason I have done the work to my 90 is because I do 30k a year in it. A Discovery would be quieter, more comfortable, cheaper, capable of everything I need, and less likely to get stolen. But I want to drive a Defender, and so I do - 500-600 miles in a day without major issue.
 
lightning said:
OK well l own a 2005 TD5 110 and on the motorway it’s fine, no need for earplugs

l’ve not done that much to it. Firstly it’s the Station Wagon which means carpeting throughout.
I fitted soundproofing to the bonnet and a few pieces stuck to some bare metal under the second row seats, and under the front cubby box/front seats.
Apart from that it’s standard County Station Wagon.
Best cruising speed is 65mph, after all it’s a Defender 110.
It’s worth spending time sorting out any rattles, bad door seals, unused holes in the bulkhead (put a rubber grommet in any you find), door rattles (for instance the window glass channel tends to rattle against the inside of the door skin, a cable tie round one end of the channel cures it completely) check the seals on the vent flaps etc

l have found that the XS version is a bit noisier at speed, the noise seems to come in through the aircon gubbins in the passenger footwell.
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This! Mine is fairly loud but far from unbearable and I do drown out with music to be fair. I had all sorts of whistles and noises. I replaced vent seals and door seals with genuine, replaced rear window slider seals, I put silent coat sound deadening over inside face of bulkhead when I had dash out and also did gearbox tunnel. I then put some closed cell foam ontop of silent coat on footwells.

I think if I went whole hog and overcoated the pads on bulkhead then did rear of the truck, I'd get quite a good result.

If your at motorway speeds all the time change transfer box to a longer disco one. I'll be doing that when it goes in for a clutch.
 
Bobsticle said:
They are all noisy until a good two inches of cow chit and straw has built up in the footwells.
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Lies. It never has chance to build up, the door seals/gaps allow water to rush in every time it is damp and flush all of the farm build up out the rust holes in the foot-well!
 
resto_d1 said:
This! Mine is fairly loud but far from unbearable and I do drown out with music to be fair. I had all sorts of whistles and noises. I replaced vent seals and door seals with genuine, replaced rear window slider seals, I put silent coat sound deadening over inside face of bulkhead when I had dash out and also did gearbox tunnel. I then put some closed cell foam ontop of silent coat on footwells.

I think if I went whole hog and overcoated the pads on bulkhead then did rear of the truck, I'd get quite a good result.

If your at motorway speeds all the time change transfer box to a longer disco one. I'll be doing that when it goes in for a clutch.
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My TD5 110's the same, new seals, silent coat and carpet on top, nothing under the bonnet though and the roof just thin headlining, might get around to doing that as I think it could still be better
Up to 50 or so it's fine you can hear the radio etc then you need to start semi shouting
 
JimS said:
My TD5 110's the same, new seals, silent coat and carpet on top, nothing under the bonnet though and the roof just thin headlining, might get around to doing that as I think it could still be better
Up to 50 or so it's fine you can hear the radio etc then you need to start semi shouting
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I’ll likely swap my disco and fender transfer boxes overs both are leaking lol.
I still have a little water leak after putting sika in all joints and new seals everywhere!!
I want carpet but can’t when I know it still leaks
 
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