On Road Noise level

[ Adam ] · Dec 29, 2023

lightning said:
Yes it's about as aerodynamic as the factory it was built in.

But if they improved the aerodynamic properties it would end up looking like the new Defender!

It's perfect just the way it is.

svmaven · Dec 29, 2023

Thanks for the info. Honestly what surprised me on test drive was the engine noise more than the road noise and wondered if I was doing something wrong or missing an overdrive button. From the responses the road noise increases a lot between 65 and 85 MPH.

Understand what it's designed for and that it's not a GT car. Ideally you don't need to tow it on the highway behind a Suburban to reach the dirt road where it excels! That's like owning a track car.

lightning · Dec 29, 2023

I've driven the Grenadier on the highway/motorway, and road noise is indeed higher than my new Defender.
But it wasn't unacceptably high, l drove the diesel version.
l didn't exceed 70mph. l wonder if different tyres might improve it for road use.

Desertfox · Dec 29, 2023

I have taken noise reading while parked with music and Aircon blower off, revving engine at 2500RPM 55 Db front seat, 50Db rear seat ( engine sound from front). Driving on road is much higher will check tomorrow and post

bemax · Dec 29, 2023

rovie said:
Hi @Flewks I don't have a roof rack on my Grenadier, but I drove a Grenadier with the Rhino at my dealer and had exactly the same experience. The wind noise level was very loud. I then drove the Grenadier with the LeTech roof rack. You can't hear it at all. This is probably because LeTech tested the rack in the wind tunnel and closed the gap between the roof and the roof rack. I have taken a photo of it. Maybe you can do something similar by yourself.

svmaven said:
Just test drove a Grenadier and was very impressed by the solidity. Big surprise was noise above 65 MPH. I expected a lot of road noise, but it seemed like the engine (in 8th gear) was the loud part. Didn't have the presence of mind to check RPMs.

Has anyone driven a Grenadier faster ? I drive across Nevada on I-80 a couple times a year where posted speed limit is 80MPH and typical speeds are 85 to 90 MPH. It's possible the Grenadier is not suited for this task, but curious if anyone has direct experience.

It’s perfectly suitable to drive it with a speed of 160 km/h (100 miles/h)
But even the diesel will empty its tank within good 3 hours then.
So the drinking habit is by far more annoying than the sound.

svmaven · Dec 30, 2023

bemax said:
It’s perfectly suitable to drive it with a speed of 160 km/h (100 miles/h)
But even the diesel will empty its tank within good 3 hours then.
So the drinking habit is by far more annoying than the sound.

Sorry to stick with SAE units! My guess is 800 miles @ 14 MPG => 57 gallons. Gas is priced a bit over $4/gallon through Nevada so call it $250 each way. Airfare would be $500 per person and would be hard to carry all the stuff and the dog. It's America and there hasn't been a passenger train to my endpoint since the 1960s.

My concern is I've found cabin noise levels in excess of 65 dBA are very fatiguing for a 12 hour drive. None of this is to take away from the purpose for the Grenadier! It's a bit like discussing whether you can comfortably drive your track car to the track or if you need to trailer your track car to the track.

Commodore · Apr 12, 2024

Interior noise level is a concern of mine. I often drive Los Angeles to Park City Utah which is about 9 1/2 hours but we also do road trips including off road through southern Utah. It was very comfortable in my full size Range Rover and very uncomfortable in my 2022 Bronco although the Bronco is much better off road.

I have now spent a full weekend taking the entire interior out of the Bronco and installing two layers of sound deadening. This dramatically dropped the the interior noise level. It's now at 70 db at 75 mph. Most of that is wind noise. Has anyone tried installing sound deadening? I saw a video of a Gren with the interior out and didn't see any sort of sound deadening on the vast expanse of metal panels.

This is about mid way through the deadening install... what a complete PIA.

DaveB · Apr 12, 2024

Here are a few video's of mine driving at various speeds and on various road surfaces.
Using an iPhone with the microphone very close to the windscreen and as it is a RHD it is near the snorkel.
I have the K02 tyres which add to the noise a bit.
I don't have any problem at all with the noise levels.
Notas quiet as my previous Mercedes obviously

View: https://youtube.com/shorts/_ezhIB-B-Fk?si=aszmUzy7iSnFqNP7

View: https://www.youtube.com/watch?v=XueXJwLqzIk

YouTube

Videos mit Freunden oder der ganzen Welt teilen

studio.youtube.com

View: https://youtube.com/shorts/PuLaPtaCM50?si=V4PHqEfAzAoQfZ9u

View: https://www.youtube.com/watch?v=srFgveXrRBo

View: https://youtube.com/shorts/rLlLfAcESmM?si=9V64c3nCK9ss4V0S

AngusMacG · Apr 12, 2024

Commodore said:
Interior noise level is a concern of mine. I often drive Los Angeles to Park City Utah which is about 9 1/2 hours but we also do road trips including off road through southern Utah. It was very comfortable in my full size Range Rover and very uncomfortable in my 2022 Bronco although the Bronco is much better off road.

I have now spent a full weekend taking the entire interior out of the Bronco and installing two layers of sound deadening. This dramatically dropped the the interior noise level. It's now at 70 db at 75 mph. Most of that is wind noise. Has anyone tried installing sound deadening? I saw a video of a Gren with the interior out and didn't see any sort of sound deadening on the vast expanse of metal panels.

This is about mid way through the deadening install... what a complete PIA.

I have no issues w/road noise at all either. I’ve driven over 7000 miles in the last 2+ months.

crashnburn · Apr 12, 2024

No complaints on noise level compared to a 200tdi D90

I can live with it but will probably tackle the sound deadening little by little in the future.

lightning · Apr 13, 2024

lf your previous vehicle was a Range Rover then you're going to notice higher noise levels in the Grenadier.

l am sure things can be improved if necessary but it will never be a Range Rover.

OGrid · Apr 13, 2024

Commodore said:
Has anyone tried installing sound deadening?

Thread 'Sound Deadening'
https://www.theineosforum.com/threads/sound-deadening.12413680/

@ChaosDogg did a rather thorough attempt earlier on

shiv.nandak · May 23, 2024

@ealshamsi Did you ever figure out the wind noise issue? I am reading the same decibel readings. I don’t have a roof rack or RAI and the Bridgestones are really quiet. So all i hear is extremely loud wind buffeting noise from 70+mph.

I have ruled out the windshield and safari roof by taping them. I suspect the noise is caused by air being diverted through the narrow channel at the bottom of the a-pillar into the door cavity just before the door seal. Or air being diverted into the door cavity from the door hinges that taper to the inside.

Skydance · May 23, 2024

shiv.nandak said:
@ealshamsi Did you ever figure out the wind noise issue? I am reading the same decibel readings. I don’t have a roof rack or RAI and the Bridgestones are really quiet. So all i hear is extremely loud wind buffeting noise from 70+mph.

I have ruled out the windshield and safari roof by taping them. I suspect the noise is caused by air being diverted through the narrow channel at the bottom of the a-pillar into the door cavity just before the door seal. Or air being diverted into the door cavity from the door hinges that taper to the inside.

Normally the wind noise is coming from the HVAC when the flaps (actuators) haven’t closed properly. To test to see if it is this, when you’re doing 70mph, switch from Auto to fan speed 1. If the wind noise or whistling has gone, then HVAC. If it persists then it will be something else. Give it a try.

shiv.nandak · May 23, 2024

Skydance said:
Normally the wind noise is coming from the HVAC when the flaps (actuators) haven’t closed properly. To test to see if it is this, when you’re doing 70mph, switch from Auto to fan speed 1. If the wind noise or whistling has gone, then HVAC. If it persists then it will be something else. Give it a try.

I have also done extensive testing with the HVAC, the HVAC is certainly noisy and whistles on the "face + leg" vent setting. However, I do not think the HVAC is causing the loud wind noise described here. I ruled out the HVAC because I taped off the air inlet for the HVAC (the one near the wipers). Unless there is another source of entry for the air into the HVAC, I do not think it's the HVAC.

Skydance · May 23, 2024

shiv.nandak said:
I have also done extensive testing with the HVAC, the HVAC is certainly noisy and whistles on the "face + leg" vent setting. However, I do not think the HVAC is causing the loud wind noise described here. I ruled out the HVAC because I taped off the air inlet for the HVAC (the one near the wipers). Unless there is another source of entry for the air into the HVAC, I do not think it's the HVAC.

Then I have no idea. Mines very quiet for a diesel. All I hear is a faint transmission whine in the background on the highway. No road, wind noise or whistling anymore.

Catpaw4x4 · May 24, 2024

lightning said:
I've driven the Grenadier on the highway/motorway, and road noise is indeed higher than my new Defender.
But it wasn't unacceptably high, l drove the diesel version.
l didn't exceed 70mph. l wonder if different tyres might improve it for road use.

The “G” and new Defender should not be compared to each other regarding road noise as they are “built” very differently/ different audience. Different level of “luxury”/ different market.

Clark Kent · May 24, 2024

Catpaw4x4 said:
The “G” and new Defender should not be compared to each other regarding road noise as they are “built” very differently/ different audience. Different level of “luxury”/ different market.

Agreed.

Bushguide asked back at post #1:
"Has anyone seen anything concerning the On Road noise of the Grenadier and in particular the wind noise associated with the snorkel.?"
This was well before he received his own vehicle. He asked a question about reports of noise. He wasn't reporting that he had an issue with noise. Despite this, there has been a pile-on ever since about unacceptably high noise levels.

Respectfully, anyone expecting new Defender, Range Rover, Disco or X7 levels of NVH in their Grenadier is probably in the wrong vehicle. I think NVH was not a high priority for Ineos and would have incurred a large weight penalty to get a useful result. Not to deny that some owners might have a specific issue due to sealing, but a moderate level of NVH including wind noise is the side effect of propelling a barge down the road.

lightning · May 24, 2024

It's actually pretty refined for the type of vehicle that it is.
A lot better than my old Defender! And no rattles or leaks.

trobex · May 24, 2024

I'm heading past 16KKms and road noise is less than my previous 2x Tritons and my current DMax tray back. Personally find it ok. It is definitely louder than an LC200 / current gen Prado as a comparison, but I honestly like road noise and cannot stand over quiet cars. Personal preference though!

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On Road Noise level

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