The Allis-Chalmers 220 was the largest tractor in the 200 Series. Its six-cylinder diesel, power steering, independent 1,000-rpm PTO, and optional front-wheel assist gave it the size and traction needed for demanding field work.
The Two-Twenty was built in the early 1970s and was offered with two- or four-wheel drive. A QCS cab was available beginning in 1972.
Serial number locations: The tractor serial number is stamped into the torque housing.
The table below shows the beginning tractor serial number for each Model 220 year:
1970-1971
| Model 220 year | Beginning serial number |
|---|
| 1970 | 1,938 |
| 1971 | 2,451 |
1972-1972
| Model 220 year | Beginning serial number |
|---|
| 1972 | 2,626 |
1973-1973
| Model 220 year | Beginning serial number |
|---|
| 1973 | 2,860 |
1970-1971
| Model 220 year | Beginning serial number |
|---|
| 1970 | 1,938 |
| 1971 | 2,451 |
1972-1973
| Model 220 year | Beginning serial number |
|---|
| 1972 | 2,626 |
| 1973 | 2,860 |
1970-1973
| Model 220 year | Beginning serial number |
|---|
| 1970 | 1,938 |
| 1971 | 2,451 |
| 1972 | 2,626 |
| 1973 | 2,860 |
Total production: 1,865 Model 220 tractors.