Ratings.

Engine Model	Advertised hp	Peak Torque	Governed Speed
ISB 275	275	660 @ 1600	2600
ISB 260	260	660 @ 1600	2500
ISB 260	260	550 @ 1900	2600
ISB 245	245	660 @ 1600	2500
ISB 230	230	520 @ 1600	2500
ISB 215	215	520 @ 1600	2500
ISB 200	200	520 @ 1600	2500
ISB 200*	200	465 @ 1600	2600
ISB 185	185	420 @ 1600	2600

*	Restricted to shuttle bus