| Opel Signum | 1.8 16V | 103 kW / 140 PS | Z18XER | SIEMENS | SIMTEC 75 |
| Opel Signum | 1.8 16V | 92 kW / 125 PS | Z18XE | SIEMENS | SIMTEC 71 |
| Opel Signum | 1.9 16V CDTI | 110 kW / 150 PS | Z19DTH | BOSCH | EDC16C9 |
| Opel Signum | 1.9 16V CDTI | 110 kW / 150 PS | Z19DTH | BOSCH | EDC16C39 |
| Opel Signum | 1.9 8V CDTI | 74 kW / 101 PS | Z19DTL | BOSCH | EDC16C9 |
| Opel Signum | 1.9 8V CDTI | 74 kW / 101 PS | Z19DTL | BOSCH | EDC16C39 |
| Opel Signum | 1.9 8V CDTI | 88 kW / 120 PS | Z19DT | BOSCH | EDC16C9 |
| Opel Signum | 1.9 8V CDTI | 88 kW / 120 PS | Z19DT | BOSCH | EDC16C39 |
| Opel Signum | 2.0 16V DTI | 74 kW / 101 PS | Y20DTH | BOSCH | EDC15M |
| Opel Signum | 2.0 16V Turbo | 129 kW / 175 PS | Z20NET | MOTOROLA | TRIONIC 8 |
| Opel Signum | 2.2 16V | 114 kW / 155 PS | Z22YH | SIEMENS | SIMTEC 81.1 |
| Opel Signum | 2.2 16V DTI | 92 kW / 125 PS | Y22DTR | BOSCH | EDC15M |
| Opel Signum | 2.8 V6 24V Turbo | 169 kW / 230 PS | Z28NEL | BOSCH | ME9.1 |
| Opel Signum | 3.0 V6 24v CDTI | 135 kW / 184 PS | Z30DT | DENSO | D0600 |
