smoothness of car engine

generally, it is said and thought that Japanese engines run smoother.

is it true in a real sense? or is it only because Japanese used to have more 4 cylinders than 6?
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25112Asked:
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25112Author Commented:
the example i was given today by some car lovers is that... "Japanese car after 4-5 years will run without any noticeable sounds.. but a Korean car after same time by same owner will have some kind of noises from the engine hood"

is there any validity to such observation?
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Michael-BestCommented:
Too many variable factors that contribute to / decide the engines life:
engine size to load ratio
driving style / conditions / temperature / air quality / etc.
grade and quality of engine oil used and regular vs non-regular oil and filter changes, also other maintainence
type of emmision contol (exaust) installed for your region
the list goes on...

generally all modern car makers are competing with similar technology, design and manufacture so one would expect similar cars / similar engines that are uased in similar conditions to last a similar life and run at a similar smoothness.

Also the bigger the engine generally the more vibration and noise.

Hpe ths hlps.
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Michael-BestCommented:
"is there any validity to such observation?"

No, not if it is a similar car  / similar price new and of the same year /and has a similar engine that is used in similar conditions.
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Tiras25Commented:
The clientele that buys Kia and Hyundai quite often can't afford to take good care of them.  Their target market seemed to be young people and lower incomes.
 
Hell, Daewoo cars were as quiet as any other car when they were new....now look at them (if you can find one.)
 
To answer your question, I think the "same owner" in your question must be one that does absolutely nothing to their car as far as maintenance and repairs. When that is the case, the car that is built with higher quality parts will obviously be in far better shape--smoother and quieter-- than the car that was built as cheapass as possible.
 
Some cars hold their resale value for a darn good reason.
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Tiras25Commented:
Also important to hote, smoothness and sounds are two entirely different things.  One is mechanical vibration measured with an accelerometer and the other vibrations coupled to air and measured with a microphone.  The source of both can be different.  Need to define better what you're talking about.
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Michael-BestCommented:
I gather from this part of question:

"will have some kind of noises from the engine hood"

The question is about engine noise only & not exaust noise or driving (road) noise which have other variables to consider.
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25112Author Commented:
that's good pointers..

>>the car that is built with higher quality parts will obviously be in far better shape

is there a way for you to know if a particular car used what kind of 'quality' parts..

for example, is there a reasonable way to compare camry 2008 vs sonata 2008? in terms of which one used better quality parts, and hence better 'noise reduction', smoothness on drive, and less exhaust sounds..
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Michael-BestCommented:
better parts cost more & even Japanese car parts are mostly manufactured overseas to reduce labour costs.

you can compare car quality by the cars price.

Please re-read:  
12/25/11 04:08 PM, ID: 37335510

Hpe ths hlps
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Michael-BestCommented:
exaust sounds depend on:

"type of emmision contol (exaust) installed for your region"

Quote:
12/25/11 03:51 PM, ID: 37335501
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Michael-BestCommented:
Furthermore hybrid & electric cars offer the smoothest & quietest driving conditions.

Hpe ths hlps.
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Tiras25Commented:
Look at the track record of each.  Resale values tell a lot of the story.  Look at real world numbers, not whatever Hyundais' Guaranteed Resale value is.

There's a reason Hyundai feels they have to offer the 100k warranty and a guaranteed resale value, while others don't need to.  Warranty and guarantees alone don't make their product any better in the long run, and they just roll the the costs into the next model years prices--the same as all other manufacturers.  Read up on them not honoring their warranty too.
 IMO, a Toyota or a Honda with 200k is still more than twice the car that a Hyundai or a Kia or a Mitsubishi is at 100k, or a Neon at....well, ever.

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Nancy McCulloughCommented:
Personally, I have always relied on Japanese cars and steer clear of American. It's just my experience.... used car values seem to show higher amounts for Japanese cars. Korean are lower, German higher, British have a mish mash of luxury with a high price (that don't run very well) and affordable work-horses.

Tiras25 makes some good points to which I agree. She seems to have a good grasp of the mechanical /auto world.

Same year different model cars (your Sonata vs Camry example) will show little difference, as the parts are similar if not the same.

As for "sound under the hood".... listen for a fast and light "ticky tcky ticky ticky" - those are likely the tapets. If one of these needs replacement, you are looking at a huge bill. If you check the oil and it's empty, just add oil and wait - the sound should disappear.

Many things have a simple fix and don't devalue a car. If you ensure that the car was cared for with regular oil changes and tune ups, the car will most likely be in good mechanical condition. If a 2004 car has never had an oil change despite being driven 3 times to Texas from Montana - you might wanna pass on it regardless of the make/model.

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Michael-BestCommented:
To the question answer:

Are you wanting advice on buying a car or as stated in your questions..asking?


"it is said and thought that Japanese engines run smoother. is it true in a real sense? "

+

"Japanese car after 4-5 years will run without any noticeable sounds.. but a Korean car after same time by same owner will have some kind of noises from the engine hood s there any validity to such observation? "

+

"is there a way for you to know if a particular car used what kind of 'quality' parts. for example, is there a reasonable way to compare camry 2008 vs sonata 2008? in terms of which one used better quality parts, and hence better 'noise reduction', smoothness on drive, and less exhaust sounds.. "

I think I have correctly answered your questions listed above.

Hpe ths hlps.
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25112Author Commented:
yes... very good answers.. thanks much
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