Choose the Peterbilt 579 for OTR driver comfort — its 76" sleeper options exceed the Western Star 47X's 0" maximum. The Peterbilt 579 offers more peak power (605 hp vs 565 hp), giving it an edge for heavy-haul and mountainous routes. The Peterbilt 579 starts at a lower base MSRP ($135k vs $145k), offering better entry-level value.
| Spec | Peterbilt 579 1151 available · from $19,995 | Western Star 47X 81 available · from $164,900 |
|---|---|---|
| Engine Options | ||
| Engine options | PACCAR MX-13, PACCAR MX-11, Cummins X15 | Detroit DD13, Cummins X15 |
| Horsepower range | 370–605 hp | 350–565 hp |
| Peak torque | 2,050 lb-ft | 2,050 lb-ft |
| Weight Ratings | ||
| GVWR (max) | 80,000 lbs | 92,000 lbs |
| GCWR | 220,000 lbs | 160,000 lbs |
| Transmission Options | ||
| Transmissions | PACCAR Automated 12-speed (TX-12), Eaton Fuller 10-speed, Allison 4700 RDS | Detroit DT12-V Vocational Automated, Allison 4500 RDS, Eaton Fuller 18-speed |
| Dimensions | ||
| Wheelbase options | 7 options (210"–280") | 4 options (175"–248") |
Choose the Peterbilt 579 for OTR driver comfort — its 76" sleeper options exceed the Western Star 47X's 0" maximum. The Peterbilt 579 offers more peak power (605 hp vs 565 hp), giving it an edge for heavy-haul and mountainous routes. The Peterbilt 579 starts at a lower base MSRP ($135k vs $145k), offering better entry-level value.
Both the Peterbilt 579 and Western Star 47X 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 Peterbilt 579 is built by Peterbilt and the Western Star 47X is built by Western Star. Both are Class 8 conventional tractors but differ in powertrain options, cab dimensions, dealer networks, and MSRP.
The Peterbilt 579 tops out at 605 hp / 2050 lb-ft torque. The Western Star 47X tops out at 565 hp / 2050 lb-ft. GVWR is 80,000 lbs for the Peterbilt 579 and 92,000 lbs for the Western Star 47X.
TruckRadar has 1,232 Peterbilt 579 and Western Star 47X trucks available right now from dealers nationwide. Search by make, model, price, and location at truckradar.ai.
| Sleeper sizes | 40", 52", 72", 76" | No sleeper |
| Pricing (estimated) |
| Base MSRP range | $135,000–$185,000 | $145,000–$195,000 |