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Old 03-17-2005, 06:21 PM   #1
Taurus95
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liters?

I don't know much about cars so excuse me for asking this. The 95 Taurus' GL come with 3.0 L and 3.8 L liters.. what does this mean and what is the difference?
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Old 03-17-2005, 06:46 PM   #2
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the 3.8 L motor is a bigger motor larger piston size or longer stroke than the 3.0L. liters refer to volume in the engine cylinder and combustion chamber of the cylinder head the more volume in engine the more liters the more fuel/air mix in the chamber and cylinder hope this helps
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Old 03-17-2005, 06:51 PM   #3
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thanks , i understand it better now
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Old 03-17-2005, 10:14 PM   #4
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Then you'd be understanding wrong. The litres figure is the combined swept volume (displacement) of each piston moving a full 180 stroke.

So if you have a 6 cylinder 3.8 litre buick motor each piston displaces 0.633 litres or 633cc. The combustion space has nothing to do with displacement.
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Old 03-17-2005, 10:56 PM   #5
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Quote:
Originally Posted by Wally
Then you'd be understanding wrong. The litres figure is the combined swept volume (displacement) of each piston moving a full 180 stroke.

So if you have a 6 cylinder 3.8 litre buick motor each piston displaces 0.633 litres or 633cc. The combustion space has nothing to do with displacement.


While you're at it, why don't you remind him that the stated displacement in liters is merely a rounded up figure and not an accurate measurement? I'm sure that helps figure out the difference between a 3 liter engine and a 3.8 liter one to someone who doesn't know what the terms mean.
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Old 03-17-2005, 11:17 PM   #6
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ah just forget the whole thing, i dont know what any of that stuff means
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Old 03-17-2005, 11:21 PM   #7
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No, but one day you will and remember you heard it here first, the forum with the fastest breaking news.
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Old 03-17-2005, 11:42 PM   #8
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Basically what it means is that as the pistons go up and down, the total (ie all 6 cylinders) change in volume is the litre value.

As a really rough example:
imagine each of your cylinders held 1 litre when the piston was at the bottom. If the piston went halfway up the cylinder before it comes back down again, then the volume of each cylinder with the piston at top dead centre would be 0.5 litres. This means that the other 0.5L has been displaced. If this was a 6 cylinder engine, then the total displaced volume would be 0.5 x 5 = 3.0 litres... so this would be a 3L engine.

If the pistons went 3/4 of the way up before coming back down again (this would have to be a totally different engine), then the final volume of each cyl would be 0.25L, so 0.75L would have been displaced. This engine would be 0.75 x 6 = 4.5L

Hope this helps.
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Old 03-17-2005, 11:50 PM   #9
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Iam a begginer too. The difference in my terms is... The 3.8 liter engine is bigger producing more speed. the 3 liter engine is smaller producing less speed. This is only good if you want to know the speed variation but, if you really want to know how it works go with everyone elses posts.
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Old 03-17-2005, 11:52 PM   #10
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More displacement doesn't mean more 'speed'. it generally just means greater torque. a ferrari enzo has a 3.5L engine, and hits 60 in 3.5. That's incredibly quick campared to the enzo's 3.3 0-60 time with a 6 liter engine. Displacement does not always mean speed.
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Old 03-17-2005, 11:53 PM   #11
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Quote:
If this was a 6 cylinder engine, then the total displaced volume would be 0.5 x 5 = 3.0 litres... so this would be a 3L engine.


My bad .... this should read 0.5 x 6 = 3.0 litres .... simple typo sorry.
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Old 03-18-2005, 12:37 AM   #12
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what exactly is a cylinder ?
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Old 03-18-2005, 12:38 AM   #13
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Are there any sites where i can learn the basics of cars? lol
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Old 03-18-2005, 01:32 AM   #14
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A few of the newbies found a site called "howstuffworks". You should be able to find it with a search engine.
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Old 03-18-2005, 01:33 AM   #15
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www.howstuffworks.com

It's a really good site for basics, and explaining stuff etc.
It's got lots of models and pictures etc. Look for automotive stuff, especially engines (or internal combustion engines or similar).
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