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 Challenger MT475D
ChallengerModel B
Challenger MT475D
Row Crop
- power
- 123 hp
- displacement
- 299 ci
- Cylinders
- 4
- Forward gears
- Not recorded
Allis ChalmersAllis Chalmers D21 Series II
vs
ChallengerChallenger MT475D
How they compare
Headline specs vs. the whole Row Crop
Engine Power
▲ MT475D higher · +2 hp (+2%)D21 Series II121 hp
MT475D123 hp
Median Row Crop Tractor138 hp
D21 Series II is in the 40th percentile; MT475D is in the 41st · 1,206 models
Engine Displacement
▲ D21 Series II higher · +127 ci (+42%)D21 Series II426 ci
MT475D299 ci
Median Row Crop Tractor391 ci
D21 Series II is in the 72nd percentile; MT475D is in the 31st · 1,409 models
Cylinders
▲ D21 Series II higher · +2 (+50%)D21 Series II6
MT475D4
Median Row Crop Tractor6
D21 Series II is in the 50th percentile; MT475D is in the 17th · 1,417 models
Operating Weight
▲ MT475D higher · +6,263 lb (+66%)D21 Series II9,502 lb
MT475D15,765 lb
Median Row Crop Tractor12,307 lb
D21 Series II is in the 28th percentile; MT475D is in the 69th · 1,350 models
D21 Series II (A)MT475D (B)Median Row Crop Tractor
Full comparison
Every spec, side by side
General Information
| Spec | Allis Chalmers D21 Series II | Challenger MT475D | Difference |
|---|---|---|---|
| Manufacturer | Allis Chalmers | Challenger | — |
| Model | D21 Series II | MT475D | — |
| Category | Row Crop | Row Crop | Same |
Engine
| Spec | Allis Chalmers D21 Series II | Challenger MT475D | Difference |
|---|---|---|---|
| Manufacturer | Allis Chalmers | AGCO Power | — |
| Model | 3500 | 49AWI | — |
| Power Output | 121hp | 123hp | ▲ MT475D+2 hp · +2% |
| Rated RPM | 2,200RPM | 2,200RPM | Same |
| Cylinders | 6 | 4 | ▲ D21 Series II+2 · +50% |
| Displacement | 426ci | 299ci | ▲ D21 Series II+127 ci · +42% |
| Bore | 4.3in | 4.3in | Same |
| Stroke | 5in | 5.3in | ▲ MT475D+0.3 in · +6% |
Transmission
| Spec | Allis Chalmers D21 Series II | Challenger MT475D | Difference |
|---|---|---|---|
| Type | Sliding gear with dry disc clutch | Continuously variable transmission (CVT) with two mechanical ranges | — |
Dimensions & Weight
| Spec | Allis Chalmers D21 Series II | Challenger MT475D | Difference |
|---|---|---|---|
| Length | 160in | Not recorded | — |
| Width | 91.3in | Not recorded | — |
| Height | 106in | Not recorded | — |
| Wheelbase | Not recorded | 105in | — |
| Operating Weight | 9,502lb | 15,765lb | ▲ MT475D+6,263 lb · +66% |
Hydraulics
| Spec | Allis Chalmers D21 Series II | Challenger MT475D | Difference |
|---|---|---|---|
| System Type | Not recorded | Direct engine drive | — |
| Steering Type | Power | Hydrostatic Power | — |
Power Take-off (PTO)
| Spec | Allis Chalmers D21 Series II | Challenger MT475D | Difference |
|---|---|---|---|
| Type | Independent | Not recorded | — |
| Speed 1 | 1,000rpm | Not recorded | — |
Tires
| Spec | Allis Chalmers D21 Series II | Challenger MT475D | Difference |
|---|---|---|---|
| Front Tire Size | Not recorded | 480/70R28 | — |
| Rear Tire Size | Not recorded | 580/70R38 | — |
Tread Width
| Spec | Allis Chalmers D21 Series II | Challenger MT475D | Difference |
|---|---|---|---|
| Front Tread Width | Not recorded | 52.8in | — |
| Rear Tread | Not recorded | 52.8in | — |
| Front Tread Adjustment | Not recorded | 52.8" to 87.8" | — |
| Rear Tread Adjustment | Not recorded | 52.8" to 87.8" | — |
Hitch & Towing
| Spec | Allis Chalmers D21 Series II | Challenger MT475D | Difference |
|---|---|---|---|
| Hitch Type | Three-Point Hitch | Category II | — |
| Hitch Category | III/II | Category 2 | — |
| Hitch Position | Rear | Rear | Same |
Chassis & Drive
| Spec | Allis Chalmers D21 Series II | Challenger MT475D | Difference |
|---|---|---|---|
| Chassis Type | 4x2 2WD | Not recorded | — |
| Drive Type | 2WD | Not recorded | — |
| Steering Type | Power | Hydrostatic Power | — |
| Brake Type | Band actuated disc | Multiple wet disc, hydraulically operated | — |
Electrical
| Spec | Allis Chalmers D21 Series II | Challenger MT475D | Difference |
|---|---|---|---|
| Starter Type | Electric | Electric | Same |
Capacities
| Spec | Allis Chalmers D21 Series II | Challenger MT475D | Difference |
|---|---|---|---|
| Coolant | 7.8gal | Not recorded | — |
Operator Station
| Spec | Allis Chalmers D21 Series II | Challenger MT475D | Difference |
|---|---|---|---|
| Type | Open | Not recorded | — |
Category context
Both models against the field
Engine Power
median 138 hpA · 40th percentile (121 hp)B · 41st percentile (123 hp)
Engine Displacement
median 391 ciA · 72nd percentile (426 ci)B · 31st percentile (299 ci)
Cylinders
median 6A · 50th percentile (6)B · 17th percentile (4)
Operating Weight
median 12,307 lbA · 28th percentile (9,502 lb)B · 69th percentile (15,765 lb)
A · D21 Series IIB · MT475DMedian Row Crop Tractor