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Old 02-08-2007, 06:06 PM   #1
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Question HP/Liter Discussion

Guys whats your takes on this HP/Liter stuff that everyone seems to think is so important. Do you thinks its important? Discuss
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Old 02-08-2007, 06:31 PM   #2
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Quote:
Originally Posted by Enthusiast
Guys whats your takes on this HP/Liter stuff that everyone seems to think is so important. Do you thinks its important? Discuss
All it is is a measurement and a number, a number that has little meaning in the real world. They use it to argue about which cars are better/worse on online forums because they don't have enough knowledge or experience to know that it doesn't really matter. Sure, it's impressive to say that car X has a power to displacement ratio of Y, but that doesn't tell me anything useful about the dynamics of the entire vehicle.

The same people who put emphasis on power/displacement usually are also concerned with peak horsepower when, once again in the real world, peak doesn't really matter. What matters is average power over the RPM range, and of course the rest of the drive train and the vehicles ability to put the power down.

Basically it's the automotive equivalent of "my dad can beat up your dad", and almost always brought up by those who don't have a clue.


Let the bellyaching begin.
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Old 02-08-2007, 06:53 PM   #3
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The trend w/ higher output/lower displacement engines is they can rev really high.


I don't know if they're ALL like that, but that's what I like about them.


The negative is that they make low torque figures and compromise drivability in the lower rpm range.
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Old 02-08-2007, 06:59 PM   #4
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Quote:
Originally Posted by Bronxie
The trend w/ higher output/lower displacement engines is they can rev really high.


I don't know if they're ALL like that, but that's what I like about them.


The negative is that they make low torque figures and compromise drivability in the lower rpm range.
Wonderful. Of course you didn't answer the question. Do you think it's (horsepower/displacement comparisons) important (we already know the answer), and why?

Discuss.
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Old 02-08-2007, 07:39 PM   #5
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What you do is divide the horsepower number by the displacement.
Example: My civic
115 horsepower 1.7 liter
67.64 HP per liter

Honda S2000 older models
240 horsepower
2 liter
120 horsepower per liter.

It really isnt that important. Power to weight ratio is a bigger factor in performance. Its why when my civic and my friend's 96 v6 accord race we are dead even.
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Old 02-08-2007, 08:56 PM   #6
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Quote:
Originally Posted by vwhobo
Wonderful. Of course you didn't answer the question. Do you think it's (horsepower/displacement comparisons) important (we already know the answer), and why?

Discuss.

Well, since the head of the council of VWhobo himself stated it isn't a relevant comparison, I saw no reason to suggest otherwise.


My only question is: Generally speaking, does it take more engineering and fine tuning to make an engine more powerful w/ less displacement?

That's one of thost common ideas I see, especially hanging around a European/Japanese car community. It's also the most common argument against domestic vehicles.
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Old 02-08-2007, 08:57 PM   #7
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Originally Posted by newyorker
What you do is divide the horsepower number by the displacement.
Example: My civic
115 horsepower 1.7 liter
67.64 HP per liter

Honda S2000 older models
240 horsepower
2 liter
120 horsepower per liter.

It really isnt that important. Power to weight ratio is a bigger factor in performance. Its why when my civic and my friend's 96 v6 accord race we are dead even.

Until what speed? Surely he'd walk you at high speeds...?
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Old 02-08-2007, 09:02 PM   #8
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Hp/liter doesn't matter much to me because it doesn't indicate performance. It may matter to the engine builder.

--------
nevermind, I don't feel like arguing for the other side.

Last edited by What : 02-08-2007 at 09:05 PM.
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Old 02-08-2007, 09:05 PM   #9
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Quote:
Originally Posted by Bronxie
Until what speed? Surely he'd walk you at high speeds...?
I creep away until 80, then he starts catching up.
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Old 02-08-2007, 09:22 PM   #10
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I creep away until 80, then he starts catching up.
For future reference, we know these races don't exist.
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Old 02-08-2007, 09:43 PM   #11
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Quote:
Originally Posted by Bronxie
Well, since the head of the council of VWhobo himself stated it isn't a relevant comparison, I saw no reason to suggest otherwise.


My only question is: Generally speaking, does it take more engineering and fine tuning to make an engine more powerful w/ less displacement?

That's one of thost common ideas I see, especially hanging around a European/Japanese car community. It's also the most common argument against domestic vehicles.
Well tell your friends to quit bitchin that they are getting stomped by domestics and they need a better excuse than hp/liter
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Old 02-08-2007, 10:15 PM   #12
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Originally Posted by Enthusiast
Well tell your friends to quit bitchin that they are getting stomped by domestics and they need a better excuse than hp/liter
So what are the guys who are "bitchin" about getting their Z28's, Mustangs GT's, etc "stomped" by my Beetle and Dakota going to use as an excuse? This goes both ways you know, and I've heard it for years.
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Old 02-08-2007, 10:27 PM   #13
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Quote:
Originally Posted by vwhobo
So what are the guys who are "bitchin" about getting their Z28's, Mustangs GT's, etc "stomped" by my Beetle and Dakota going to use as an excuse? This goes both ways you know, and I've heard it for years.


hehe i have a Dakota....
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Old 02-08-2007, 11:04 PM   #14
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Arguing why a car is better/worse because of hp/l is useless drabble. I wouldn't say the same about hp/l itself though. If I were building a small tuner it'd be easier to put a turbo fourbanger in it rather than trying to shoehorn in a V8 making the same power.
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Old 02-09-2007, 12:31 AM   #15
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Well I don't know if I agree with everyone agreeing with VWHobo ....... where's the purchase in that?

So if I have a 1 litre engine and I get more power output than the other guy with a 1 litre in the same model car, is it a pointless comparison?
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