Horsepower is torque times speed (and maybe a constant to get the right
units). If your torque is in ft. lbs and you multiply by the rpm of the
engine, you get your horsepower. You can look at the torque curves and
horsepower curves for engines in car magazines that review the cars.

When people talk about an engine that "has a lot of torque" what they
mean, usually, is that it has a lot of torque at low rpm.

The design of the engine, the bore and stroke and size of the pistons
and weight and size of the crank and flywheel all play a part in how
much torque and horsepower an engine has. I don't really think that a
diesel engine has more torque by being a diesel. It's just that these
are usually truck engines and they want it to have good pull at lower
rpm, so they make it so it has good torque at low rpm. However, I'm no
expert.

yunustaboglu@gmail.com wrote:
> Well , im trying to have your opinons buddies , im doing a small search
> bout this subject . so anyhelp . i got a lot of stuff but still
> wondering how the torque can have direct effect on the engine .
>
> waiting al ur replies .
>
> 10x advance ,