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Re: Torque ? (archive)

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Posted by Ted Getchell on September 24, 1998 at 17:01:07:

In Reply to: Re: Torque ? posted by MR on September 24, 1998 at 10:34:06:

Actually, torque is what makes the wheels turn and what gives you a push in the back when you step on the gas at any speed. Horsepower is just a measure of torque at some rpm (roughly torque times RPM).

In smaller displacement engines, torque starts low and builds to a maximum at relatively high rpm; a higher displacement engine will usually have more torque available at lower rpm. Both cars COULD have the same horsepower rating, it's just available in different ways.

Car specs show maximum torque and maximum HP. Since engine torque (and therefore horsepower) vary between 0 and max rpm, what you like to see, I think, is is a fairly flat torque output right up to maximum engine rpm. And the 540 has exactly that!

A supercharger forces more gas and air into each cylinder creating more energy from each ignition cycle. This creates more torque at all engine speeds.

Sorry, once I got started I couldn't quit. Probably way more than you wanted ;-).

Cheers.

Ted
'95 540iA

: I think torque is for low end (acceleration), and HP is for high speed. So a good balance of torque/HP is ideal. Like the 4.4 Liter V8 in the 540. It has 282HP and 310lb of torque. 0-60 time for the 6 speed is 5.5 sec. and a limited top speed of 155MPH. But gear ratio setting is also important. IMHO.

: MR

:
: : So hp does not matter ??

: : To accelerate - torque is much more important ?
: : So does the supercharger helps ??




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