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in *simplest* terms...
torque = acceleration
horsepower = top speed
remember, horsepower is @ one specific rpm, and rises with rpms..
while torque is more broadly spread over the rev range...and you have to
*use that rev range* to accelerate.
you can't accelerate with the engine at max horsepower (well, maybe with a
CVT) because then the *engine isn't accelerating*
again, this is in the simplest terms...
>I was always under the impression that:
> torque = pulling power
> horse power = acceleration
>An over square engine (b>s) will generally be low in torque at lower rpms,
>will rev freely and create hp as rpms build.
>An undersquare engine (s>b) will pull from lower rpms and loose power as
>Of course, I could be wrong, as I was once. (Voted for McGovern)
>> In a message dated 4/8/99 9:14:42 PM Central Daylight Time,
>> email@example.com writes:
>> << Oh, I know this. But while it may help initial torque, it limits the
>> potential of the engine to produce massive amounts of power without
>> Basically, I don't like the theory of small bore long stroke engines.
>> puts a lot of stress on the lower end, and limits redline and power
>> For example, Audi engines have what, 86 mm strokes lets say, that's
>> inches or so. An F 1 or Porsche boxer engine has a stroke of maybe
>> inches...sometimes less...
>> that is the way to go...large bore, short stroke....interesting way for
>> Audi to go...but i guess they really aren't a performance car
>> company.....hmm >>
>> Audi makes commuter cars, that is cars for every day driving, and the
>> occasional weekend driving event. That means one thing TORQUE. With
>> you can always get horsepower and using the proper gearing the sky is the
>> limit. Look at some of the modern turbo Diesel Trucks torque in the
>> of 1,200 to 2,000 ft lb. of torque. Some of the European racing trucks
>> top out way above 150 MPH, it's torque that glues your back to the seat