[viXit]

Ever had a Vento TDI or a Rapid pass you and the engine being noisy as hell?
It’s almost like there are a bunch of nuts and bolts rattling loudly inside the engine.

No other diesel I’ve ever been near has been that loud and loose sounding? Why is this?
Or is it just me?
More so in skodas than VW. But it’s a similar sound.

[Shreyans_Jain]

Originally Posted by viXit

Ever had a Vento TDI or a Rapid pass you and the engine being noisy as hell?
It’s almost like there are a bunch of nuts and bolts rattling loudly inside the engine.

No other diesel I’ve ever been near has been that loud and loose sounding? Why is this?
Or is it just me?
More so in skodas than VW. But it’s a similar sound.

My friend, you need to spend some time with a diesel City or Amaze. Honda’s 1.5 iDTEC takes the cake for being the single worst engine when it comes to NVH.

The VW engine sounds coarse in its own right, but at least it is rev happy and provides punchy performance and a wide torque curve.

[viXit]

Originally Posted by Shreyans_Jain

My friend, you need to spend some time with a diesel City or Amaze. Honda’s 1.5 iDTEC takes the cake for being the single worst engine when it comes to NVH.

The VW engine sounds coarse in its own right, but at least it is rev-happy and provides punchy performance and a wide torque curve.

Hey,
I have a city i-dtec 1.5, and although it is very noisy. It isn't as bad as some of the VAGs. I promise. They are EXTREMELY loud and coarse.
Newer VWs don't sound that bad. But as they age, they get VERY noise. My neighbour has one and I've heard it for a while now.

The city imo is not a noisy engine, just bad damping et al

[Turbohead]

I own one but I really don't know how loud it gets outside because it's sufficiently insulated on the inside (but not as quite as a Hyundai inside).

I think it has something to do with the EGR. Once the engine crosses 3500 RPM, the EGR valve closes ( from what I've extensively read) and the engine suddenly sounds sporty (for a diesel) and the coarse clatter disappears

But I have no clue about the intricacies and why it happens the way it does.

[punto_]

I feel my Punto which has clocked over 126000 kms is loud. I just started hating diesel engines for their loud noise. I have seen some VAGs sound almost like a tractor! In that sense, Punto is better.

Hyundai diesels are an exception though.

[ameaa]

On vento and rapid this knocking sound is from injectors i beleive.. whereas octavia and superb engines are very silent. I was told by a skoda engineer that its related to ecu software and wear and tear on injectors. Post dieselgate software update many rapids were making these sounds which even skoda couldnt rectify mainly on older engines.

[CarguyNish]

Originally Posted by viXit

Ever had a Vento TDI or a Rapid pass you and the engine being noisy as hell?.......

Yes, VAG Engines are noisy but that's applies to just few of the engines. Mainly, Polo/Vento/Rapid. But, the bigger cars like Jetta, Superb, Passat, Q5, AT have very refined engine. When cruising they are as smooth as Petrol. While idling you can tell it's a Diesel but the insulation is so well done, it is very negligible. So, yes VAG Engines are noisy and refined as well.

Originally Posted by Shreyans_Jain

Honda’s 1.5 iDTEC takes the cake for being the single worst engine when it comes to NVH.

The VW engine sounds coarse in its own right, but at least it is rev happy and provides punchy performance and a wide torque curve.

Honda engine is a Aluminium Unit unlike Cast Iron of VAG, aluminum engines are noisy, but they make up by giving excellent fuel economy.

Agree that the VAG Engines are rev friendly and give enough pull due to Torque curve which is not flat.

Originally Posted by viXit

Hey,
I have a city i-dtec 1.5, and although it is very noisy. It isn't as bad as some of the VAGs. I promise.......The city imo is not a noisy engine, just bad damping et al

I guess additional damping should make it more refined especially when the one in Civic Diesel is more refined compared to City.

Originally Posted by Turbohead

I think it has something to do with the EGR. Once the engine crosses 3500 RPM, the EGR valve closes ( from what I've extensively read) and the engine suddenly sounds sporty (for a diesel) and the coarse clatter disappears

Yes, I have felt the same in Rapid that I used in 2013-17.

Originally Posted by punto_

I feel my Punto which has clocked over 126000 kms is loud. I just started hating diesel engines for their loud noise. I have seen some VAGs sound almost like a tractor! In that sense, Punto is better.

Hyundai diesels are an exception though.

MJD is refined compared to VAG at lower speeds. But as you pick up speed, the VAG becomes quiet. Hyundai Diesel engines are very refined. Brands looking to improve Refinement should have a case study of those engine.

[viXit]

Originally Posted by CarguyNish

Y

Honda engine is a Aluminium Unit unlike Cast Iron of VAG, aluminum engines are noisy, but they make up by giving excellent fuel economy.



I guess additional damping should make it more refined especially when the one in Civic Diesel is more refined compared to City.

How will damping make the engine more refined? It will just make sure you don't hear the sounds.

I might sound biased but really, from an objective standpoint, I have not heard any diesel sound so loose, knocky?? and unrefined. Even while doing pulls, the characteristics of the noise don't change.

My safari had some injector problems that lead to knocking. The vags sound very similar to that but exponentially louder

[WhiteSierra]

Forget about Rapids and Ventos. My friend has a 2015 Audi A4 35 TDI, which ran about 60 k Kms so far. It sounds like a tractor. He named it a baby tractor. He tried many engine oil additives to make the engine sound less harsher along with various types of injector cleaners, he also used fuel treatment additives, nothing worked or showed significant impact. He told me that the sound was like this from brand new, increased after 15k kms. He got his injectors checked, everything were perfect, no error codes thrown up on the scan tool too.

Liqui Moly Cera Tec worked fine for a while ~ 10 - 15 K kms, after that post oil change the sound was back to normal. He did not want to invest 3k+ for oil additive / friction modifier all the time. He is living with that sound now and it has become a part of his life. Heck, even my 25+ year old Sierras sound better while idling and revving below 2k RPM. I generally love diesel engine grunt in idling, when revved and also the sound of turbo spooling. But Rapids, Ventos and few Audis with 2.0 TDIs are extremely noisy, sounds like old tractor engines.

[SKC-auto]

I too feel VW diesel engines, atleast the one in vento sounds very loud.

One more thing which I have noticed is, Etios and Tempo traveller diesel engines have horrible smell, I instantly get migraine when I had to smell these exhaust gases, don't know why only these 2 vehicles I don't know.

[punto_]

Originally Posted by viXit

How will damping make the engine more refined? It will just make sure you don't hear the sounds.

I got dampening done for my Punto at 3M, it didn't really help much with the engine noise. The only benefit is reduces some road noise and makes the audio experience better.

[motor spirit]

Originally Posted by viXit

Ever had a Vento TDI or a Rapid pass you and the engine being noisy as hell?

I bet. My neighbor has a 4~5 year old Skoda rapid TDI & our road has a small inclination for about 50 meters long till it reaches the main road.
Every morning the roar & the clatter of the car engine from the first crank till he takes it out of the compound & passes every house is like a siren to everyone reminding that the time is around 8:00AM .

[landcruiser123]

Now that you mention it, I find it very surprising considering VW are considered the diesel engine experts. I recently encountered a Jetta TDI in the US which stood out compared to all other cars on the road.

Honda or Toyota diesels are noisier, but diesels aren't what they specialize in.

[ph03n!x]

During the early days of 3-pot Petrols and Diesels from the VW stable, I used to joke that their engines sound alike irrespective of the fuel - Diesel sounded bad, and Petrol matched it note for note.

This could be my bias (used to have a Getz 1.5 CRDi and a Verna 1.6 CRDi), but I always felt that only Hyundai took the effort to refine Diesels - so much that some of their cars didn't even have insulation on the hood.

While Fords, Renaults, VW, Toyota, Fiat all had nice tractable engines, they always were poorer in NVH. And then there were disasters like the Celerio 2 pot .

[Firoshg]

I own a 1.9PD TDI Jetta and have found the engine noise to be higher than other diesel cars that I have owned over the years. The whole neighbourhood knows when I go out, thanks to the loud clattering of the engine, especially in the morning. But it hasn't bothered me much as its been very reliable till now.