2020 Street Triple RS torque vs FZ07

[NikitaUCLA]

2020 Street Triple has 121 HP and 58 ft-lb torque.

The FZ07 has 75 HP and 50 ft-lb of torque. 

 

Something is wrong with the Street Triple?

[kylerhsm]

16 minutes ago, NikitaUCLA said:

2020 Street Triple has 121 HP and 58 ft-lb torque.

The FZ07 has 75 HP and 50 ft-lb of torque. 

 

Something is wrong with the Street Triple?

Not really. Torque is "generally" relative to the capacity of an engine and so being a 765cc it should have approximately 10% more torque than the MT07 with all other things equal. It's faily close, at 50ft-lb to 58ft-lb. The Street has slightly more torque per cc so it's probably tuned slightly more agressively (higher compression, valves, cams, etc...).

Power is the product of torque multiplied by RPM, and so the peak HP is relatively to the RPM's at which the engine is producing high torque (although not necessarily the exact peak torque).

For the Street to be able to output 121HP with only 58 ft-lb of torque, it must be producing this torque at a fairly high RPM. For instance, 58 ft-lb at 10,000 RPM is double the power of 58 ft-lb at 5,000RPM.

For the MT07 to only generate 75HP with 50 ft-lb of torque, it must be (and as we know it is) producing this torque at a faily low RPM.

Whilst some bikes are just tuned more agressively than others, in general the manufacturers will design an engine with peak torque wherever they choose. Yamaha put the peak torque of the MT07 down low in the rev range to give the bike incredible acceleration from down lown and to have it performing optimally in this rev range which also gives it great fuel economy. Triumph obviously wanted a lot of peak HP, so you'll find that they put the peak torque higher in the RPM range, sacrificing down low acceleration and fuel economy for top end power.

Different bikes for different purposes.

[norcal616]

Different bikes... One is a low rpm torque monster with a huge wide TQ curve and the other is a high revving motor with a peaky TQ curve

Some brands go by BHP( crank/flywheel HP/tq- main EU power reference) or by WHP ( power at the rear wheel- lower than BHP due to driveline loss- main USA power reference)...