SPECS / COMPARISON
David Brown 990 Implematic vs Allis Chalmers D15 Series II
A detailed comparison of the David Brown 990 Implematic and the Allis Chalmers D15 Series II. Click a model name to view its full specifications.
Weight
David Brown 990 Implematic1940.0 kg (4277.0 lbs)
Allis Chalmers D15 Series II2050.0 kg (Gasoline: 4221.8 lbs (1915.0 kg) LP-gas: 4464.4 lbs (2025.0 kg) Diesel: 4519.5 lbs)
| Specification | David Brown 990 Implematic Agricultural Tractors | Allis Chalmers D15 Series II Agricultural Tractors |
|---|---|---|
| Tractor Type | Utility Tractor | Row-Crop Tractor |
| Horsepower | 38.8 kW (52.1 HP) | — |
| Weight | 1940.0 kg (4277.0 lbs) | 2050.0 kg (Gasoline: 4221.8 lbs (1915.0 kg) LP-gas: 4464.4 lbs (2025.0 kg) Diesel: 4519.5 lbs) |
| Transmission Type | Partially synchronized | Shuttle |
| Length | 299.0 cm (117.7 in.) | 330.0 cm (129.9 in.) |
| Years Made | 1961-1965 | 1960-1968 |
| Engine Model | David Brown | Allis Chalmers D-175 |
| Engine Type | 4-stroke, liquid-cooled, inline | 4-stroke, liquid-cooled, inline |
| Fuel Type | Diesel | Diesel |
| Cylinders | 4 | 4 |
| Displacement | 3044 cc (185.8 cu in.) | 2867 cc (175.0 cu in.) |
| Bore | 9.19 cm (3.62 in.) | 8.99 cm (3.54 in.) |
| Stroke | 11.40 cm (4.49 in.) | 11.10 cm (4.37 in.) |
| Rear PTO Type | Transmission or live | Live |
| Rear PTO Speed | 540 /1000 RPM | 540 RPM |
| Rated RPM | 2200 RPM | — |
| Compression Ratio | 17.0:1 | 15.5:1 |
| Battery | Two 6V | 12 V, 70Ah, one for gas/LP-gas, two for diesel |
| Starter | Electric | Electric |
| Height | 142.0 cm (Hood Height: 55.9 in.) | 203.0 cm (79.9 in.) |
| Wheelbase | 194.0 cm (76.4 in.) | mm |
| Ground Clearance | 50.0 cm (Front axle: 19.7 in.) | — |
| Fuel Tank Capacity | 52.0 l (13.7 gal) | 59.6 l (Gas/diesel: 16.0 gal (60.6 l) LP-gas: 15.7 gal) |
| Oil Capacity | 7.4 l (2.0 gal) | 4.7 l (1.2 gal) |
| Coolant Capacity | 13.6 l (3.6 gal) | 11.4 l (3.0 gal) |
| Gears | 12 forward and 4 reverse | 4 forward and 4 reverse |
| Chassis | 4×2 2WD | 4×2 2WD |
| Max. Travel Speed | 10.4 km/h (Forward: 11.9 MPH (19.1 km/h) Reverse: 6.5 MPH) | 7.5 km/h (Forward: 14.9 MPH (24.0 km/h) Reverse: 4.7 MPH) |
| Brakes | Differential mechanical expanding shoe | Expanding shoe |
| Differential Lock | Mechanical rear | — |
| Drawbar Category | II/I | II/I |
| Cabin Type | Open operator station | Open operator station |
| Steering Type | Manual or hydrostatic power | Manual or power |
| Front Tires | Ag: 6.00-16 | Ag: 5.50-16, 6.50-16 |
| Rear Tires | Ag: 11-32 | Ag: 12.4-26, 13.6-26, 14.9-26 |
| Hydraulic Type | Open center | — |
| Total Flow | 28.0 LPM (7.4 GPM) | — |
| Working Pressure | 137.9 bar (2000.0 psi) | 158.6 bar (2300.0 psi) |
| Spark Plug | — | AC C-45Champion J-7Auto-Lite A-5 |
| Width | — | 170.0 cm (66.9 in.) |
| Transmission Oil Capacity | — | 14.0 l (3.7 gal) |
| Hydraulic Capacity | — | 9.5 l (2.5 gal) |
| Valves | — | 0 to 3 |
Values come from the manufacturer-sourced model files; empty cells mean the property is not published for that model. No performance ranking is applied.