
CaseIHModel A
CaseIH STX450QT Quadtrac
Articulated
- power
- 450 hp
- displacement
- 912 ci
- Cylinders
- 6
- Forward gears
- 16
Head to head · Articulated

Articulated
Four-Wheel Drive
How they compare
STX450QT Quadtrac is in the 50th percentile; 9R 440 is in the 32nd · 62 models
STX450QT Quadtrac is in the 67th percentile; 9R 440 is in the 47th · 61 models
STX450QT Quadtrac is in the 50th percentile; 9R 440 is in the 50th · 61 models
STX450QT Quadtrac is in the 50th percentile; 9R 440 is in the 97th · 59 models
Full comparison
| Spec | CaseIH STX450QT Quadtrac | John Deere 9R 440 | Difference |
|---|---|---|---|
| Manufacturer | CaseIH | John Deere | — |
| Model | STX450QT Quadtrac | 9R 440 | — |
| Category | Articulated | Four-Wheel Drive | — |
| Spec | CaseIH STX450QT Quadtrac | John Deere 9R 440 | Difference |
|---|---|---|---|
| Manufacturer | Cummins | John Deere | — |
| Model | QSX15 | John Deere Diesel | — |
| Power Output | 450hp | 390hp | ▲ STX450QT Quadtrac+60 hp · +15% |
| Rated RPM | 2,000RPM | 1,800RPM | ▲ STX450QT Quadtrac+200 RPM · +11% |
| Cylinders | 6 | 6 | Same |
| Displacement | 912ci | 826ci | ▲ STX450QT Quadtrac+86 ci · +10% |
| Bore | 5.4in | 5.2in | ▲ STX450QT Quadtrac+0.2 in · +4% |
| Stroke | 6.7in | 6.5in | ▲ STX450QT Quadtrac+0.2 in · +3% |
| Spec | CaseIH STX450QT Quadtrac | John Deere 9R 440 | Difference |
|---|---|---|---|
| Type | Full Power Shift | Full power shift | Same |
| Spec | CaseIH STX450QT Quadtrac | John Deere 9R 440 | Difference |
|---|---|---|---|
| Length | Not recorded | 313in | — |
| Width | 44in | 173in | ▲ 9R 440+129 in · +293% |
| Height | Not recorded | 147in | — |
| Operating Weight | 51,335lb | 46,800lb | ▲ STX450QT Quadtrac+4,535 lb · +10% |
| Spec | CaseIH STX450QT Quadtrac | John Deere 9R 440 | Difference |
|---|---|---|---|
| System Type | Pressure Flow Compensated (PFC) | Dual pump system | — |
| Steering Type | Hydrostatic Power | Hydrostatic and articulated | — |
| Spec | CaseIH STX450QT Quadtrac | John Deere 9R 440 | Difference |
|---|---|---|---|
| Speed 1 | Not recorded | 1,000rpm | — |
| Spec | CaseIH STX450QT Quadtrac | John Deere 9R 440 | Difference |
|---|---|---|---|
| Hitch Category | IVN/III | IV | — |
| Hitch Position | Rear | Not recorded | — |
| Spec | CaseIH STX450QT Quadtrac | John Deere 9R 440 | Difference |
|---|---|---|---|
| Chassis Type | 4x4 (Quadtrac) | Not recorded | — |
| Drive Type | Quad-Trac | Not recorded | — |
| Steering Type | Hydrostatic Power | Hydrostatic and articulated | — |
| Brake Type | Not recorded | Wet multiple disc hydraulically actuated | — |
| Spec | CaseIH STX450QT Quadtrac | John Deere 9R 440 | Difference |
|---|---|---|---|
| Starter Type | Electric | Electric | Same |
| Spec | CaseIH STX450QT Quadtrac | John Deere 9R 440 | Difference |
|---|---|---|---|
| Coolant | Not recorded | 14.9gal | — |
| Spec | CaseIH STX450QT Quadtrac | John Deere 9R 440 | Difference |
|---|---|---|---|
| Type | Not recorded | Cab | — |
Category context