Peterbilt
Model 579
Full specifications
| Driver Display | 15 inch | ↗ |
| Engine Option 1 | PACCAR MX-13 | ↗ |
| Engine Option 2 | PACCAR MX-11 | ↗ |
| Engine Option 3 | Cummins X15 | ↗ |
| Engine Option 4 | Cummins X15N (Natural Gas) | ↗ |
| Engine Option 5 | Cummins ISX12N (Natural Gas) | ↗ |
| Engine Option 6 | Cummins L9N (Natural Gas) | ↗ |
| Front Axle Rating | 12,000 - 14,600 lbs. | ↗ |
| ISX12N Displacement | 11.9 L | ↗ |
| ISX12N Max Horsepower | Up to 400 hp | ↗ |
| ISX12N Max Torque | Up to 1,450 lb.-ft. | ↗ |
| L9N Displacement | 8.9 L | ↗ |
| L9N Horsepower | 320 hp | ↗ |
| L9N Torque | 1,000 lb.-ft. | ↗ |
| MX-11 Displacement | 10.8 L | ↗ |
| MX-11 Max Horsepower | Up to 445 hp | ↗ |
| MX-11 Max Torque | Up to 1,700 lb.-ft. | ↗ |
| MX-13 Displacement | 12.9 L | ↗ |
| MX-13 Max Horsepower | Up to 510 hp | ↗ |
| MX-13 Max Torque | Up to 1,850 lb.-ft. | ↗ |
| Sleeper Options | 44" to 80" Ultra Loft | ↗ |
| UltraLoft Headroom | 8 ft. | ↗ |
| UltraLoft Storage | 70 cu. ft. | ↗ |
| Vehicle Class | 8 | ↗ |
| X15 Displacement | 15 L | ↗ |
| X15 Max Horsepower | Up to 605 hp | ↗ |
| X15 Max Torque | Up to 2,050 lb.-ft. | ↗ |
| X15N Displacement | 14.5 L | ↗ |
| X15N Max Horsepower | Up to 500 hp | ↗ |
Every figure is traced to the manufacturer’s published data. ↗ opens the source.
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