| Engine | Advertised | Peak | Governed | | Model | hp | Torque | Speed | | ISL 310 | 310 | 1050 @ 1300 | 2100 | | ISL 330 | 330 | 1150 @ 1300 | 2100 | | ISL 350** | 350 | 1050 @ 1300 | 2200 | | ISL 350 | 350 | 1250 @ 1300 | 2100 | | ISL 370* | 370 | 1200 @ 1300 | 2200 | | ISL 400* | 400 | 1200 @ 1300 | 2200 |
| * Restricted for use in RV and fire truck applications |
| ** Rating designed for use with Allison MD3066 in 4x2 applications |
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