Western Star 4900 vs Kenworth W900
Two trucks compared spec for spec: the 4900 (1990s–2021, Up to 605 hp) against the W900 (1961–2024, Up to 605 hp). Same data we keep on every truck in the encyclopedia — and Mike on hand if the answer depends on your routes and loads.
4900
The classic hand-built Star.
W900
A six-decade legend. The long-nose icon.
| Spec | Western Star 4900 | Kenworth W900 |
|---|---|---|
| Maker | Daimler Truck North America | PACCAR |
| Class | Class 8 | Class 8 |
| Body type | Severe-Duty | Sleeper |
| Years | 1990s–2021 | 1961–2024 |
| Rating | Up to 160,000 lb GCWR | Up to 80,000 lb GCWR |
| Power | Up to 605 hp | Up to 605 hp |
| Engines | Detroit DD15, Cummins X15 | PACCAR MX-13, Cummins X15, Cummins ISX |
| Applications | Heavy haul, Mining, Logging | Owner-operator, Show truck |
About the Western Star 4900
For decades the 4900 was Western Star's heavy-duty conventional flagship, offered with the roomy Constellation cab introduced in 1996 from a joint Western Star/DAF design, large sleepers, and even a lowered-cab Low Max variant built for auto haulers. It was retired and replaced by the next-generation 49X for the 2021 model year, ending one of the brand's longest production runs.
About the Kenworth W900
Introduced in 1961, the W900 (the 'W' honors Kenworth co-founder Edgar Worthington) defined the long-hood American conventional and pioneered bulkhead-style doors with full-length hinges that rivals later copied. The 1990 W900L added 10 inches of hood, and after a 63-year run Kenworth confirmed in 2025 that the legendary truck would end production in 2026.
Which one fits your operation?
Specs only get you so far — routes, loads and the shop that maintains it matter. Mike, the free AI truck consultant, talks it through with you. No account, 24/7.
