..factor of every day normal car type engine performance, i.e. torque production, although modern camshaft continual adjustment systems(a la VTEC) do help an otherwise torque-strangled engine produce higher figures at differing rpm.
More torque means you have more force, bhp determines the speed at which that force can be applied.
For example, my 6.1 litre V12 has only two valves per cylinder, produces 'only' 440 bhp, yet has 620 Nm of torque...
On the road that equates to staggering mid-range performance without the need for multi-valves.
Don't also forget the dimensional ratio between piston size & piston stroke, one that is 'equal' is known as being a 'square' engine, as most are today, an optimum balance between bhp & torque figures.
An under-square engine means a longer stroke in comparison to piston size & will be (generally) lower revving, less bhp, but more torque production.
An over-square engine means a shorter stroke in comparison to piston size & will be (generally) a higher revving, more bhp, but less torque production.
Each of the above engine configurations will produce very different drives, number of gear-changes as just one example.
As correctly stated valves & the number thereof per cylinder govern fuel air mix & the efficiency thereof, however they aren't the only aspects to engine performance & consequent on or off-road vehicle driving characteristics.
..factor of every day normal car type engine performance, i.e. torque production, although modern camshaft continual adjustment systems(a la VTEC) do help an otherwise torque-strangled engine produce higher figures at differing rpm.
More torque means you have more force, bhp determines the speed at which that force can be applied.
For example, my 6.1 litre V12 has only two valves per cylinder, produces 'only' 440 bhp, yet has 620 Nm of torque...
On the road that equates to staggering mid-range performance without the need for multi-valves.
Don't also forget the dimensional ratio between piston size & piston stroke, one that is 'equal' is known as being a 'square' engine, as most are today, an optimum balance between bhp & torque figures.
An under-square engine means a longer stroke in comparison to piston size & will be (generally) lower revving, less bhp, but more torque production.
An over-square engine means a shorter stroke in comparison to piston size & will be (generally) a higher revving, more bhp, but less torque production.
Each of the above engine configurations will produce very different drives, number of gear-changes as just one example.
As correctly stated valves & the number thereof per cylinder govern fuel air mix & the efficiency thereof, however they aren't the only aspects to engine performance & consequent on or off-road vehicle driving characteristics.
Torque