Choose the Kenworth W990 for OTR driver comfort — its 86" sleeper options exceed the Western Star 57X's 72" maximum. The Kenworth W990 offers more peak power (605 hp vs 600 hp), giving it an edge for heavy-haul and mountainous routes.
| Spec | Kenworth W990 64 available · from $66,000 | Western Star 57X 255 available · from $19,500 |
|---|---|---|
| Engine Options | ||
| Engine options | Cummins X15, PACCAR MX-13 | Detroit DD16, Detroit DD13 Gen 5, Detroit DD15 Gen 5 |
| Horsepower range | 400–605 hp | 370–600 hp |
| Peak torque | 2,050 lb-ft | 2,050 lb-ft |
| Weight Ratings | ||
| GVWR (max) | 80,000 lbs | — |
| GCWR | 250,000 lbs | — |
| Transmission Options | ||
| Transmissions | Eaton Fuller 18-speed, PACCAR Automated 12-speed (TX-12), Eaton Endurant HD 12-speed | Detroit DT12 Direct and Overdrive AMT |
| Dimensions | ||
| Wheelbase options | 3 options (244"–280") | 0 options (undefined"–undefined") |
Choose the Kenworth W990 for OTR driver comfort — its 86" sleeper options exceed the Western Star 57X's 72" maximum. The Kenworth W990 offers more peak power (605 hp vs 600 hp), giving it an edge for heavy-haul and mountainous routes.
Both the Kenworth W990 and Western Star 57X 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 Kenworth W990 is built by Kenworth and the Western Star 57X is built by Western Star. Both are Class 8 conventional tractors but differ in powertrain options, cab dimensions, dealer networks, and MSRP.
The Kenworth W990 tops out at 605 hp / 2050 lb-ft torque. The Western Star 57X tops out at 600 hp / 2050 lb-ft. GVWR is 80,000 lbs for the Kenworth W990 and similar lbs for the Western Star 57X.
TruckRadar has 319 Kenworth W990 and Western Star 57X trucks available right now from dealers nationwide. Search by make, model, price, and location at truckradar.ai.
| Sleeper sizes | 40", 52", 76", 86" | 60", 72" |
| Pricing (estimated) |
| Base MSRP range | $170,000–$225,000 | — |