
CaterpillarModel A
Caterpillar Diesel Forty
Industrial
- power
- Not recorded
- displacement
- 624 ci
- Cylinders
- 3
- Forward gears
- 4
Head to head · Industrial

Industrial
Industrial
How they compare
Diesel Forty is in the 75th percentile; Fifty is in the 80th · 53 models
Diesel Forty is in the 21st percentile; Fifty is in the 50th · 55 models
Diesel Forty is in the 30th percentile; Fifty is in the 30th · 43 models
Diesel Forty is in the 62nd percentile; Fifty is in the 68th · 49 models
Full comparison
| Spec | Caterpillar Diesel Forty | Caterpillar Fifty | Difference |
|---|---|---|---|
| Manufacturer | Caterpillar | Caterpillar | Same |
| Model | Diesel Forty | Fifty | — |
| Category | Industrial | Industrial | Same |
| Spec | Caterpillar Diesel Forty | Caterpillar Fifty | Difference |
|---|---|---|---|
| Manufacturer | Caterpillar | Caterpillar | Same |
| Model | D6600 | 4-cyl gasoline | — |
| Rated RPM | 1,000RPM | 850RPM | ▲ Diesel Forty+150 RPM · +18% |
| Cylinders | 3 | 4 | ▲ Fifty+1 · +33% |
| Displacement | 624ci | 693ci | ▲ Fifty+69 ci · +11% |
| Bore | 5.8in | 5.3in | ▲ Diesel Forty+0.5 in · +9% |
| Stroke | 8in | 8in | Same |
| Spec | Caterpillar Diesel Forty | Caterpillar Fifty | Difference |
|---|---|---|---|
| Type | Gear | Gear | Same |
| Spec | Caterpillar Diesel Forty | Caterpillar Fifty | Difference |
|---|---|---|---|
| Width | 16in | 15in | ▲ Diesel Forty+1 in · +7% |
| Operating Weight | 15,642lb | 18,245lb | ▲ Fifty+2,603 lb · +17% |
Category context