Engine Model | Advertised HP | Peak Torque | ISX 565 | 565 | 1850 @ 1200 | ISX 530 | 530 | 1850 @ 1200 | ISX 525* | 525 | 1650 @ 1200 | ISX 500 | 500 | 1850 @ 1200 | ISX 500 | 500 | 1650 @ 1200 | ISX 475 | 475 | 1850 @ 1200 | ISX 475 | 475 | 1650 @ 1200 | ISX 450 | 450 | 1650 @ 1200 | ISX 450 | 450 | 1550 @ 1200 | ISX 400 | 400 | 1650 @ 1200 | ISX 400 | 400 | 1550 @ 1200 | ISX 400 | 400 | 1450 @ 1200 |
ISX Smart Torque Ratings//--> Engine Model | Advertised HP | Peak Torque | ISX 500 ST | 500 | 1650/1850 @ 1200 | ISX 475 ST | 475 | 1650/1850 @ 1200 | ISX 450 ST | 450 | 1450/1650 @ 1200 | ISX 435 ST | 435 | 1450/1650 @ 1200 | ISX 400 ST | 400 | 1450/1650 @ 1200 |
ISX Vocational Ratings| Engine Model | Advertised HP | Peak Torque | | ISX 465V | 465 | 1650 @ 1200 | | ISX 435V | 435 | 1450 @ 1200 |
| | All ratings are 2000 rpm governed speed | | * | Restricted to RV and fire |
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