SPECS / COMPARISON
Allis Chalmers D21 Series I vs Oliver 1755
A detailed comparison of the Allis Chalmers D21 Series I and the Oliver 1755. Click a model name to view its full specifications.
Weight
Allis Chalmers D21 Series I4310.0 kg (9501.9 lbs)
Oliver 17554355.0 kg (9601.1 lbs)
| Specification | Allis Chalmers D21 Series I Agricultural Tractors | Oliver 1755 Agricultural Tractors |
|---|---|---|
| Tractor Type | Row-Crop Tractor | Row-Crop Tractor |
| Horsepower | 76.8 kW (103.0 HP) | — |
| Weight | 4310.0 kg (9501.9 lbs) | 4355.0 kg (9601.1 lbs) |
| Transmission Type | Sliding gear with dry disc clutch | Partial power shift |
| Length | 407.0 cm (160.2 in.) | 387.0 cm (2WD: 159.4 in. (405.0 cm) 4WD: 152.4 in.) |
| Years Made | 1963-1965 | 1970-1975 |
| Engine Model | Allis Chalmers 3400 | Waukesha-Oliver |
| Engine Type | 4-stroke, liquid-cooled, inline | 4-stroke, liquid-cooled, inline |
| Fuel Type | Diesel | Gasoline |
| Cylinders | 6 | 6 |
| Displacement | 6980 cc (425.9 cu in.) | 4638 cc (283.0 cu in.) |
| Bore | 10.79 cm (4.25 in.) | 9.80 cm (3.86 in.) |
| Stroke | 12.70 cm (5.00 in.) | 10.21 cm (4.02 in.) |
| Rear PTO Type | Independent | Independent |
| Rear PTO Speed | 1.000 RPM | 540, 1000 RPM |
| Rated RPM | 2200 RPM | — |
| Compression Ratio | 16.0:1 | 8.5:1 |
| Battery | Two or four 12V, 95Ah | — |
| Starter | Electric | Electric |
| Height | 270.0 cm (106.3 in.) | 217.0 cm (Steering Wheel Height: 85.4 in.) |
| Width | 232.0 cm (91.3 in.) | 204.0 cm (80.3 in.) |
| Wheelbase | 244.0 cm (96.1 in.) | 219.0 cm (2WD: 102.8 in. (261.0 cm) 4WD: 86.2 in.) |
| Fuel Tank Capacity | 196.8 l (52.0 gal) | 132.5 l (35.0 gal) |
| Oil Capacity | 11.4 l (3.0 gal) | 7.6 l (2.0 gal) |
| Coolant Capacity | 19.9 l (5.3 gal) | 18.9 l (5.0 gal) |
| Transmission Oil Capacity | 87.1 l (17.0 gal (64.4 l) 23.0 gal) | — |
| Transmission Model | Power Director | Hydraul-Shift |
| Gears | 8 forward and 2 reverse | 18 forward and 6 reverse |
| Chassis | 4×2 2WD | 4×2 2WD or 4×4 MFWD 4WD |
| Max. Travel Speed | 11.0 km/h (Forward: 16.2 MPH (26.0 km/h) Reverse: 6.8 MPH) | 9.3 km/h (Forward: 17.2 MPH (27.7 km/h) Reverse: 5.8 MPH) |
| Brakes | Band actuated disc | Differential hydraulic dry disc |
| Drawbar Category | III/II | II/I or III/II |
| Cabin Type | Open operator station | Open operator station. Optional two-post ROPS and cab. |
| Steering Type | Power | Power |
| Front Tires | Ag: 7.50×20 | Ag: 7.50-15 , 13.6-24 |
| Rear Tires | Ag: 18.4×34 | Ag: 18.4-34 |
| Lift Capacity | — | 2721.0 kg (4001.4 lbs (1815.0 kg) Category III: 5998.8 lbs) |
| Pump Flow | — | 75.7 LPM (20.0 GPM) |
| Horsepower (PTO) | — | 64.1 kW (86.0 HP) |
| Ground Clearance | — | 34.0 cm (2WD: 25.2 in. (64.0 cm) 4WD: 13.4 in.) |
| Hydraulic Capacity | — | 25.5 l (6.7 gal) |
| Hydraulic Type | — | Closed center |
Values come from the manufacturer-sourced model files; empty cells mean the property is not published for that model. No performance ranking is applied.