Allis ChalmersModel A
Allis Chalmers D21 Series II
Row Crop
- power
- 121 hp
- displacement
- 426 ci
- Cylinders
- 6
- Forward gears
- 8
Head to head · Row Crop
Allis Chalmers D21 Series II vs Claas Arion 520
Image not recorded
ClaasModel B
Claas Arion 520
Row Crop
- power
- 120 hp
- displacement
- 276 ci
- Cylinders
- 4
- Forward gears
- 24
Allis ChalmersAllis Chalmers D21 Series II
vs
ClaasClaas Arion 520
How they compare
Headline specs vs. the whole Row Crop
Engine Power
▲ D21 Series II higher · +1 hp (<1%)D21 Series II121 hp
Arion 520120 hp
Median Row Crop Tractor138 hp
D21 Series II is in the 40th percentile; Arion 520 is in the 39th · 1,206 models
Engine Displacement
▲ D21 Series II higher · +150 ci (+54%)D21 Series II426 ci
Arion 520276 ci
Median Row Crop Tractor391 ci
D21 Series II is in the 72nd percentile; Arion 520 is in the 25th · 1,409 models
Cylinders
▲ D21 Series II higher · +2 (+50%)D21 Series II6
Arion 5204
Median Row Crop Tractor6
D21 Series II is in the 50th percentile; Arion 520 is in the 17th · 1,417 models
Forward Gears
▲ Arion 520 higher · +16 (+200%)D21 Series II8
Arion 52024
Median Row Crop Tractor16
D21 Series II is in the 16th percentile; Arion 520 is in the 81st · 1,200 models
D21 Series II (A)Arion 520 (B)Median Row Crop Tractor
Full comparison
Every spec, side by side
General Information
| Spec | Allis Chalmers D21 Series II | Claas Arion 520 | Difference |
|---|---|---|---|
| Manufacturer | Allis Chalmers | Claas | — |
| Model | D21 Series II | Arion 520 | — |
| Category | Row Crop | Row Crop | Same |
Engine
| Spec | Allis Chalmers D21 Series II | Claas Arion 520 | Difference |
|---|---|---|---|
| Manufacturer | Allis Chalmers | DPS | — |
| Model | 3500 | Not recorded | — |
| Power Output | 121hp | 120hp | ▲ D21 Series II+1 hp · <1% |
| Rated RPM | 2,200RPM | 2,200RPM | Same |
| Cylinders | 6 | 4 | ▲ D21 Series II+2 · +50% |
| Displacement | 426ci | 276ci | ▲ D21 Series II+150 ci · +54% |
| Bore | 4.3in | Not recorded | — |
| Stroke | 5in | Not recorded | — |
Transmission
| Spec | Allis Chalmers D21 Series II | Claas Arion 520 | Difference |
|---|---|---|---|
| Type | Sliding gear with dry disc clutch | Partial power shift with power shuttle | — |
Dimensions & Weight
| Spec | Allis Chalmers D21 Series II | Claas Arion 520 | Difference |
|---|---|---|---|
| Length | 160in | 193in | ▲ Arion 520+33 in · +21% |
| Width | 91.3in | Not recorded | — |
| Height | 106in | 117in | ▲ Arion 520+11 in · +10% |
| Operating Weight | 9,502lb | 12,060lb | ▲ Arion 520+2,558 lb · +27% |
Hydraulics
| Spec | Allis Chalmers D21 Series II | Claas Arion 520 | Difference |
|---|---|---|---|
| System Type | Not recorded | Open Center | — |
| Steering Type | Power | Not recorded | — |
Power Take-off (PTO)
| Spec | Allis Chalmers D21 Series II | Claas Arion 520 | Difference |
|---|---|---|---|
| Type | Independent | Not recorded | — |
| Speed 1 | 1,000rpm | Not recorded | — |
Tread Width
| Spec | Allis Chalmers D21 Series II | Claas Arion 520 | Difference |
|---|---|---|---|
| Front Tread Width | Not recorded | 14.9in | — |
| Rear Tread | Not recorded | 18.4in | — |
Hitch & Towing
| Spec | Allis Chalmers D21 Series II | Claas Arion 520 | Difference |
|---|---|---|---|
| Hitch Type | Three-Point Hitch | Not recorded | — |
| Hitch Category | III/II | Not recorded | — |
| Hitch Position | Rear | Not recorded | — |
Chassis & Drive
| Spec | Allis Chalmers D21 Series II | Claas Arion 520 | Difference |
|---|---|---|---|
| Chassis Type | 4x2 2WD | 4x4 MFWD 4WD | — |
| Drive Type | 2WD | 4WD | — |
| Steering Type | Power | Not recorded | — |
| Brake Type | Band actuated disc | Not recorded | — |
Electrical
| Spec | Allis Chalmers D21 Series II | Claas Arion 520 | Difference |
|---|---|---|---|
| Starter Type | Electric | Not recorded | — |
Capacities
| Spec | Allis Chalmers D21 Series II | Claas Arion 520 | Difference |
|---|---|---|---|
| Coolant | 7.8gal | Not recorded | — |
Operator Station
| Spec | Allis Chalmers D21 Series II | Claas Arion 520 | Difference |
|---|---|---|---|
| Type | Open | Not recorded | — |
Category context
Both models against the field
Engine Power
median 138 hpA · 40th percentile (121 hp)B · 39th percentile (120 hp)
Engine Displacement
median 391 ciA · 72nd percentile (426 ci)B · 25th percentile (276 ci)
Cylinders
median 6A · 50th percentile (6)B · 17th percentile (4)
Forward Gears
median 16A · 16th percentile (8)B · 81st percentile (24)
Operating Weight
median 12,307 lbA · 28th percentile (9,502 lb)B · 49th percentile (12,060 lb)
A · D21 Series IIB · Arion 520Median Row Crop Tractor