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Allis ChalmersModel A
Allis Chalmers D21 Series I
Row Crop
- power
- 103 hp
- displacement
- 426 ci
- Cylinders
- 6
- Forward gears
- 8
Head to head · Row Crop
Allis Chalmers D21 Series I vs John Deere 6510
John DeereModel B
John Deere 6510
Utility
- power
- 105 hp
- displacement
- 414 ci
- Cylinders
- 6
- Forward gears
- 24
Allis ChalmersAllis Chalmers D21 Series I
vs
John DeereJohn Deere 6510
How they compare
Headline specs vs. the whole Row Crop
Engine Power
▲ 6510 higher · +2 hp (+2%)D21 Series I103 hp
6510105 hp
Median Row Crop Tractor138 hp
D21 Series I is in the 27th percentile; 6510 is in the 28th · 1,206 models
Engine Displacement
▲ D21 Series I higher · +12 ci (+3%)D21 Series I426 ci
6510414 ci
Median Row Crop Tractor391 ci
D21 Series I is in the 72nd percentile; 6510 is in the 66th · 1,409 models
Cylinders
= Effectively tiedD21 Series I6
65106
Median Row Crop Tractor6
D21 Series I is in the 50th percentile; 6510 is in the 50th · 1,417 models
Forward Gears
▲ 6510 higher · +16 (+200%)D21 Series I8
651024
Median Row Crop Tractor16
D21 Series I is in the 16th percentile; 6510 is in the 81st · 1,200 models
D21 Series I (A)6510 (B)Median Row Crop Tractor
Full comparison
Every spec, side by side
General Information
| Spec | Allis Chalmers D21 Series I | John Deere 6510 | Difference |
|---|---|---|---|
| Manufacturer | Allis Chalmers | John Deere | — |
| Model | D21 Series I | 6510 | — |
| Category | Row Crop | Utility | — |
Engine
| Spec | Allis Chalmers D21 Series I | John Deere 6510 | Difference |
|---|---|---|---|
| Manufacturer | Allis Chalmers | John Deere | — |
| Model | 3400 | Not recorded | — |
| Power Output | 103hp | 105hp | ▲ 6510+2 hp · +2% |
| Rated RPM | 2,200RPM | 2,300RPM | ▲ 6510+100 RPM · +5% |
| Cylinders | 6 | 6 | Same |
| Displacement | 426ci | 414ci | ▲ D21 Series I+12 ci · +3% |
| Bore | 4.3in | 4.2in | ▲ D21 Series I+0.1 in · +2% |
| Stroke | 5in | 5in | Same |
Transmission
| Spec | Allis Chalmers D21 Series I | John Deere 6510 | Difference |
|---|---|---|---|
| Type | Sliding gear with dry disc clutch | PowrQuad | — |
Dimensions & Weight
| Spec | Allis Chalmers D21 Series I | John Deere 6510 | Difference |
|---|---|---|---|
| Length | 161in | 179in | ▲ 6510+18 in · +11% |
| Width | 91.6in | 91.3in | ▲ D21 Series I+0.3 in · <1% |
| Height | 107in | 111in | ▲ 6510+4 in · +4% |
| Operating Weight | 9,500lb | 10,360lb | ▲ 6510+860 lb · +9% |
Hydraulics
| Spec | Allis Chalmers D21 Series I | John Deere 6510 | Difference |
|---|---|---|---|
| System Type | Not recorded | closed-center load sensing | — |
| Steering Type | Power | hydrostatic power | — |
Power Take-off (PTO)
| Spec | Allis Chalmers D21 Series I | John Deere 6510 | Difference |
|---|---|---|---|
| Type | Independent | Not recorded | — |
| Speed 1 | 1,000rpm | Not recorded | — |
Hitch & Towing
| Spec | Allis Chalmers D21 Series I | John Deere 6510 | Difference |
|---|---|---|---|
| Hitch Type | Three-Point Hitch | Not recorded | — |
| Hitch Category | III/II | Category 3 | — |
| Hitch Position | Rear | Not recorded | — |
Chassis & Drive
| Spec | Allis Chalmers D21 Series I | John Deere 6510 | Difference |
|---|---|---|---|
| Chassis Type | 4x2 2WD | Not recorded | — |
| Drive Type | 2WD | Not recorded | — |
| Steering Type | Power | hydrostatic power | — |
| Brake Type | Band actuated disc | Not recorded | — |
Electrical
| Spec | Allis Chalmers D21 Series I | John Deere 6510 | Difference |
|---|---|---|---|
| Starter Type | Electric | Electric | Same |
Capacities
| Spec | Allis Chalmers D21 Series I | John Deere 6510 | Difference |
|---|---|---|---|
| Coolant | 5.3gal | 3.4gal | ▲ D21 Series I+1.9 gal · +56% |
Operator Station
| Spec | Allis Chalmers D21 Series I | John Deere 6510 | Difference |
|---|---|---|---|
| Type | Open | Not recorded | — |
Category context
Both models against the field
Engine Power
median 138 hpA · 27th percentile (103 hp)B · 28th percentile (105 hp)
Engine Displacement
median 391 ciA · 72nd percentile (426 ci)B · 66th percentile (414 ci)
Cylinders
median 6A · 50th percentile (6)B · 50th percentile (6)
Forward Gears
median 16A · 16th percentile (8)B · 81st percentile (24)
Operating Weight
median 12,307 lbA · 28th percentile (9,500 lb)B · 34th percentile (10,360 lb)
A · D21 Series IB · 6510Median Row Crop Tractor