Allis ChalmersModel A
Allis Chalmers S
Crawler
- power
- Not recorded
- displacement
- 675 ci
- Cylinders
- 4
- Forward gears
- 5
Head to head · Crawler
Allis Chalmers S vs International Harvester TD-18
Image not recorded
International HarvesterModel B
International Harvester TD-18
Standard Tread
- power
- Not recorded
- displacement
- 691 ci
- Cylinders
- 6
- Forward gears
- 6
Allis ChalmersAllis Chalmers S
vs
International HarvesterInternational Harvester TD-18
How they compare
Headline specs vs. the whole Crawler
Engine Displacement
▲ TD-18 higher · +16 ci (+2%)S675 ci
TD-18691 ci
Median Crawler Tractor468 ci
S is in the 72nd percentile; TD-18 is in the 73rd · 191 models
Cylinders
▲ TD-18 higher · +2 (+50%)S4
TD-186
Median Crawler Tractor6
S is in the 33rd percentile; TD-18 is in the 50th · 192 models
Forward Gears
▲ TD-18 higher · +1 (+20%)S5
TD-186
Median Crawler Tractor10
S is in the 25th percentile; TD-18 is in the 34th · 179 models
Operating Weight
▲ TD-18 higher · +1,400 lb (+7%)S20,100 lb
TD-1821,500 lb
Median Crawler Tractor23,320 lb
S is in the 46th percentile; TD-18 is in the 48th · 173 models
S (A)TD-18 (B)Median Crawler Tractor
Full comparison
Every spec, side by side
General Information
| Spec | Allis Chalmers S | International Harvester TD-18 | Difference |
|---|---|---|---|
| Manufacturer | Allis Chalmers | International Harvester | — |
| Model | S | TD-18 | — |
| Category | Crawler, Agricultural | Standard Tread | — |
Engine
| Spec | Allis Chalmers S | International Harvester TD-18 | Difference |
|---|---|---|---|
| Manufacturer | Allis Chalmers | International Harvester | — |
| Rated RPM | 1,050RPM | 1,200RPM | ▲ TD-18+150 RPM · +14% |
| Cylinders | 4 | 6 | ▲ TD-18+2 · +50% |
| Displacement | 675ci | 691ci | ▲ TD-18+16 ci · +2% |
| Bore | 5.8in | 4.8in | ▲ S+1 in · +21% |
| Stroke | 6.5in | 6.5in | Same |
Transmission
| Spec | Allis Chalmers S | International Harvester TD-18 | Difference |
|---|---|---|---|
| Type | Gear | Gear | Same |
Dimensions & Weight
| Spec | Allis Chalmers S | International Harvester TD-18 | Difference |
|---|---|---|---|
| Length | 146in | 166in | ▲ TD-18+20 in · +14% |
| Width | 97in | 95in | ▲ S+2 in · +2% |
| Height | 74in | 106in | ▲ TD-18+32 in · +43% |
| Operating Weight | 20,100lb | 21,500lb | ▲ TD-18+1,400 lb · +7% |
Hydraulics
| Spec | Allis Chalmers S | International Harvester TD-18 | Difference |
|---|---|---|---|
| Steering Type | Manual | Not recorded | — |
Hitch & Towing
| Spec | Allis Chalmers S | International Harvester TD-18 | Difference |
|---|---|---|---|
| Hitch Category | Not recorded | Category 3 | — |
Chassis & Drive
| Spec | Allis Chalmers S | International Harvester TD-18 | Difference |
|---|---|---|---|
| Chassis Type | Crawler | Not recorded | — |
| Drive Type | Track | Not recorded | — |
| Steering Type | Manual | Not recorded | — |
Electrical
| Spec | Allis Chalmers S | International Harvester TD-18 | Difference |
|---|---|---|---|
| Starter Type | Electric | Electric Starter (gasoline start) | — |
Capacities
| Spec | Allis Chalmers S | International Harvester TD-18 | Difference |
|---|---|---|---|
| Coolant | 12.5gal | 26gal | ▲ TD-18+13.5 gal · +108% |
Category context
Both models against the field
Engine Displacement
median 468 ciA · 72nd percentile (675 ci)B · 73rd percentile (691 ci)
Cylinders
median 6A · 33rd percentile (4)B · 50th percentile (6)
Forward Gears
median 10A · 25th percentile (5)B · 34th percentile (6)
Operating Weight
median 23,320 lbA · 46th percentile (20,100 lb)B · 48th percentile (21,500 lb)
Length
median 146 inA · 50th percentile (146 in)B · 58th percentile (166 in)
A · SB · TD-18Median Crawler Tractor