Choose the Peterbilt 579 for OTR driver comfort — its 76" sleeper options exceed the Mack LR Series's 0" maximum. The Peterbilt 579 offers more peak power (605 hp vs 505 hp), giving it an edge for heavy-haul and mountainous routes. The Peterbilt 579 starts at a lower base MSRP ($135k vs $190k), offering better entry-level value.
| Spec | Mack LR Series 4 available · from $89,900 | Peterbilt 579 1151 available · from $19,995 |
|---|---|---|
| Engine Options | ||
| Engine options | Mack MP7, Mack MP8 | PACCAR MX-13, PACCAR MX-11, Cummins X15 |
| Horsepower range | 325–505 hp | 370–605 hp |
| Peak torque | 1,860 lb-ft | 2,050 lb-ft |
| Weight Ratings | ||
| GVWR (max) | 66,000 lbs | 80,000 lbs |
| GCWR | 66,000 lbs | 220,000 lbs |
| Transmission Options | ||
| Transmissions | Mack mDRIVE HD 12-speed Automated, Allison 4500 RDS | PACCAR Automated 12-speed (TX-12), Eaton Fuller 10-speed, Allison 4700 RDS |
| Dimensions | ||
| Wheelbase options | 4 options (157"–214") | 7 options (210"–280") |
Choose the Peterbilt 579 for OTR driver comfort — its 76" sleeper options exceed the Mack LR Series's 0" maximum. The Peterbilt 579 offers more peak power (605 hp vs 505 hp), giving it an edge for heavy-haul and mountainous routes. The Peterbilt 579 starts at a lower base MSRP ($135k vs $190k), offering better entry-level value.
Both the Mack LR Series and Peterbilt 579 hold strong resale value among owner-operators and fleets. Resale depends heavily on mileage, maintenance history, and regional demand — not OEM brand alone. Check current listings on TruckRadar for real-world asking prices.
No. The Mack LR Series is built by Mack and the Peterbilt 579 is built by Peterbilt. Both are Class 8 conventional tractors but differ in powertrain options, cab dimensions, dealer networks, and MSRP.
The Mack LR Series tops out at 505 hp / 1860 lb-ft torque. The Peterbilt 579 tops out at 605 hp / 2050 lb-ft. GVWR is 66,000 lbs for the Mack LR Series and 80,000 lbs for the Peterbilt 579.
TruckRadar has 1,155 Mack LR Series and Peterbilt 579 trucks available right now from dealers nationwide. Search by make, model, price, and location at truckradar.ai.
| Sleeper sizes | No sleeper | 40", 52", 72", 76" |
| Pricing (estimated) |
| Base MSRP range | $190,000–$260,000 | $135,000–$185,000 |