Originally Posted by brandont
The V8 offers gobs of torque which is what you feel when you drive the car. As the saying goes people drive torque but buy HP. The feeling of great power when you tip in the throttle is torque - that's what people like. HP is actually a measure of efficiency not outright power.
That torque people "feel" means there is a lot of horsepower available when they stab the throttle because horsepower is torque applied at a given rpm. So, the more torque you have at a specified rpm, then the more horsepower you have available at that rpm; they are are not
independent. The Hemi has more than the Pentastar all over. You can have 500 ft-lbs of torque applied to something (static) but if it isn't moving, then you have no horsepower and feel nada.
Also, comparing peak torque ratings is not the whole story; more importantly is the size of the area under the torque curve
. Torque peak is where the engine maximizes volumetric efficiency (maximizing the air-fuel volume intake charge) and occurs at an rpm that is determined by the engine's cam valve timing and intake/exhaust system design...turbo engines can generate peak torque across several thousand rpm (huge torque curve area) while N/A engines cannot but come close with variable valve timing.
Variable valve timing enhances the peak range torque so that it is fatter and flatter (i.e. the Pentastar and Hemi can have 80%-90% of peak torque thousands of rpm lower than their rated peak torque rpm)...broadening the torque curve. The key here is the more toque at a given rpm that you have, then the more horsepower that you have and that is why the Hemi is quicker. Horsepower is the measure of work available...a measure of work being done. The broader the torque curve is, then the more horsepower (available work) you can do across the rpm range.
IMHO, the Hemi WK2 is one heck of a lot quicker than the C&D test and several drag strip observations of stock Hemi WK2s confirm that.