
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; R5 is in the 73rd · 53 models
Diesel Forty is in the 21st percentile; R5 is in the 50th · 55 models
Diesel Forty is in the 30th percentile; R5 is in the 30th · 43 models
Diesel Forty is in the 62nd percentile; R5 is in the 58th · 49 models
Full comparison
| Spec | Caterpillar Diesel Forty | Caterpillar R5 | Difference |
|---|---|---|---|
| Manufacturer | Caterpillar | Caterpillar | Same |
| Model | Diesel Forty | R5 | — |
| Category | Industrial | Industrial | Same |
| Spec | Caterpillar Diesel Forty | Caterpillar R5 | Difference |
|---|---|---|---|
| Manufacturer | Caterpillar | Caterpillar | Same |
| Model | D6600 | Not recorded | — |
| Rated RPM | 1,000RPM | 950RPM | ▲ Diesel Forty+50 RPM · +5% |
| Cylinders | 3 | 4 | ▲ R5+1 · +33% |
| Displacement | 624ci | 618ci | ▲ Diesel Forty+6 ci · <1% |
| Bore | 5.8in | 5.5in | ▲ Diesel Forty+0.3 in · +5% |
| Stroke | 8in | 6.5in | ▲ Diesel Forty+1.5 in · +23% |
| Spec | Caterpillar Diesel Forty | Caterpillar R5 | Difference |
|---|---|---|---|
| Type | Gear | Gear | Same |
| Spec | Caterpillar Diesel Forty | Caterpillar R5 | Difference |
|---|---|---|---|
| Length | Not recorded | 139in | — |
| Width | 16in | 72.5in | ▲ R5+56.5 in · +353% |
| Height | Not recorded | 69.3in | — |
| Operating Weight | 15,642lb | 13,675lb | ▲ Diesel Forty+1,967 lb · +14% |
| Spec | Caterpillar Diesel Forty | Caterpillar R5 | Difference |
|---|---|---|---|
| Coolant | Not recorded | 9.3gal | — |
Category context