In 1984, Allis-Chalmers was in a difficult position and the company was purchased by Deutz. Deutz rebranded the Allis tractors as Deutz-Allis and began importing Deutz-Fahr tractors under the Deutz-Allis name. The Simplicity-built Allis lawn and garden tractors were produced in Deutz-Allis green until Allis was sold again, forming AGCO.
AGCO - official site
| Model | Power | Mower Deck | Years |
| 920 | 18 hp | 48" deck | 1984 - 1985 |
| 917H | 17 hp | 48" deck | 1985 - 1992 |
| 608 | 8 hp | 36" deck | 1986 - 1987 |
| 830 | 8 hp | 30" deck | 1986 - 1990 |
| 912 | 12 hp | 42" deck | 1986 - 1987 |
| 914 | 14 hp | 42" deck | 1986 - 1987 |
| 916 | 16 hp | 48" deck | 1986 - 1991 |
| 919H | 19 hp | 42/48" deck | 1986 |
| T-813 | 13 hp | 42" deck | 1986 - 1987 |
| T-816 | 16 hp | 48" deck | 1986 - 1987 |
| 612 | 12 hp | 36" deck | 1987 - 1990 |
| 613 | 12 hp | 36/42" deck | 1987 - 1990 |
| 616 | 16 hp | 42/48" deck | 1987 - 1990 |
| 1036 | 10 hp | 36" deck | 1987 - 1992 |
| 1918 | 18 hp | 42/48/60" deck | 1987 - 1992 |
| 1920 | 20 hp | 42/48/60" deck | 1987 - 1992 |
| Vanguard FC8 | 8 hp | 36/42" deck | 1987 - 1989 |
| Vanguard FC12 | 12 hp | 36/42" deck | 1987 - 1989 |
| 1814 | 14 hp | 42" deck | 1988 - 1990 |
| 1816 | 16 hp | 48" deck | 1988 - 1991 |
| 1914 | 14 hp | 42" deck | 1988 - 1990 |
| 1916 | 16 hp | 42/48" deck | 1988 - 1990 |
| Vanguard FC12H | 12 hp | 36/42" deck | 1988 - 1989 |
| 1817 | 17 hp | 48" deck | 1989 - 1991 |
| 1613H | 12 hp | 38" deck | 1990 - 1992 |
| 1616H | 16 hp | 44" deck | 1990 - 1992 |
| 512G | 12 hp | 36" deck | 1991 - 1992 |
| 512H | 12 hp | 36" deck | 1991 - 1992 |