Allis ChalmersModel A
Allis Chalmers HD3
Utility
- power
- Not recorded
- displacement
- 175 ci
- Cylinders
- 4
- Forward gears
- 8
Head to head · Utility
Allis Chalmers HD3 vs David Brown 40TD
David BrownModel B
David Brown 40TD
Agricultural
- power
- Not recorded
- displacement
- 165 ci
- Cylinders
- 4
- Forward gears
- 6
Allis ChalmersAllis Chalmers HD3
vs
David BrownDavid Brown 40TD
How they compare
Headline specs vs. the whole Utility
Engine Displacement
▲ HD3 higher · +10 ci (+6%)HD3175 ci
40TD165 ci
Median Utility Tractor183 ci
HD3 is in the 46th percentile; 40TD is in the 44th · 5,580 models
Cylinders
= Effectively tiedHD34
40TD4
Median Utility Tractor4
HD3 is in the 50th percentile; 40TD is in the 50th · 5,720 models
Forward Gears
▲ HD3 higher · +2 (+33%)HD38
40TD6
Median Utility Tractor12
HD3 is in the 23rd percentile; 40TD is in the 11th · 4,941 models
Operating Weight
▲ 40TD higher · +405 lb (+5%)HD37,645 lb
40TD8,050 lb
Median Utility Tractor5,303 lb
HD3 is in the 73rd percentile; 40TD is in the 76th · 5,107 models
HD3 (A)40TD (B)Median Utility Tractor
Full comparison
Every spec, side by side
General Information
| Spec | Allis Chalmers HD3 | David Brown 40TD | Difference |
|---|---|---|---|
| Manufacturer | Allis Chalmers | David Brown | — |
| Model | HD3 | 40TD | — |
| Category | Utility | Agricultural | — |
Engine
| Spec | Allis Chalmers HD3 | David Brown 40TD | Difference |
|---|---|---|---|
| Manufacturer | Allis Chalmers | David Brown | — |
| Rated RPM | 1,650RPM | 2,200RPM | ▲ 40TD+550 RPM · +33% |
| Cylinders | 4 | 4 | Same |
| Displacement | 175ci | 165ci | ▲ HD3+10 ci · +6% |
| Bore | 3.6in | 3.6in | Same |
| Stroke | 4.4in | 4in | ▲ HD3+0.4 in · +10% |
Transmission
| Spec | Allis Chalmers HD3 | David Brown 40TD | Difference |
|---|---|---|---|
| Type | Two-speed power shift, mechanical shuttle | Gear | — |
Dimensions & Weight
| Spec | Allis Chalmers HD3 | David Brown 40TD | Difference |
|---|---|---|---|
| Length | 109in | 113in | ▲ 40TD+4 in · +4% |
| Height | 48.3in | 62in | ▲ 40TD+13.7 in · +28% |
| Operating Weight | 7,645lb | 8,050lb | ▲ 40TD+405 lb · +5% |
Hydraulics
| Spec | Allis Chalmers HD3 | David Brown 40TD | Difference |
|---|---|---|---|
| System Type | Open Center | Not recorded | — |
| Steering Type | Mechanical clutches | Not recorded | — |
Chassis & Drive
| Spec | Allis Chalmers HD3 | David Brown 40TD | Difference |
|---|---|---|---|
| Steering Type | Mechanical clutches | Not recorded | — |
Electrical
| Spec | Allis Chalmers HD3 | David Brown 40TD | Difference |
|---|---|---|---|
| Starter Type | Electric | Electric | Same |
Capacities
| Spec | Allis Chalmers HD3 | David Brown 40TD | Difference |
|---|---|---|---|
| Coolant | 2.3gal | 4.2gal | ▲ 40TD+1.9 gal · +83% |
Category context
Both models against the field
Engine Displacement
median 183 ciA · 46th percentile (175 ci)B · 44th percentile (165 ci)
Cylinders
median 4A · 50th percentile (4)B · 50th percentile (4)
Forward Gears
median 12A · 23rd percentile (8)B · 11th percentile (6)
Operating Weight
median 5,303 lbA · 73rd percentile (7,645 lb)B · 76th percentile (8,050 lb)
Length
median 137 inA · 15th percentile (109 in)B · 18th percentile (113 in)
A · HD3B · 40TDMedian Utility Tractor