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Old 03-10-2008, 02:22 AM   #1
LayzeeHayzee
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Question Acceleration rate question...

Hi you guys,
I was wonderin if anyone could help me...


Long story short; I need to know (or know where/how to find out) what the average acceleration rate of a 4 cylinder car is..

ANY help would be SO appreciated.
Thanks
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Old 03-10-2008, 02:41 AM   #2
Cliffy
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Quote:
Originally Posted by LayzeeHayzee
Hi you guys,
I was wonderin if anyone could help me...


Long story short; I need to know (or know where/how to find out) what the average acceleration rate of a 4 cylinder car is..

ANY help would be SO appreciated.
Thanks
That question is far too generalised. I understand that you want an average, but there's so many cars that differ so vastly, I wouldn't have thought an average would be much use! Assuming you mean 0-62 times; A Caterham7 will do this in about 4-seconds, and a Cevrolet Matiz (Aveo in the States?) will do it in about 15-seconds....
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Old 03-12-2008, 02:22 AM   #3
zacknolden
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Cars only use their rated horsepower when they are accelerating, which is not too often compared to the time spent going at a steady speed; so acceleration (and therefore peak power) hardly counts at all when it comes to gas mileage.

The typical 4 cylinder develops peak horsepower at much higher RPM than a V-8, so the baseline overhead/losses at typical idle and cruise speeds may be actually lower than half. (less than half the friction area at the rings; smaller, lighter valves)

Last edited by zacknolden : 03-12-2008 at 02:26 AM.
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Old 03-12-2008, 02:47 AM   #4
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Quote:
Originally Posted by zacknolden
Cars only use their rated horsepower when they are accelerating, which is not too often compared to the time spent going at a steady speed; so acceleration (and therefore peak power) hardly counts at all when it comes to gas mileage.

The typical 4 cylinder develops peak horsepower at much higher RPM than a V-8, so the baseline overhead/losses at typical idle and cruise speeds may be actually lower than half. (less than half the friction area at the rings; smaller, lighter valves)
He asked what the average acceleration of a 4-cylinder car is...That doesn't have anything to do with peak power, gas mileage, or 8-cylinder vehicles.

Also, torque is what makes a car accelerate, horsepower tells you how long it will accelerate.
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Old 03-12-2008, 04:03 PM   #5
GreekWarrior
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transmission and gear ratios are what play the biggest part.
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