| Opel Signum 2.2 direct | 2198cc 114KW 155HP Z 22 YH | 2003 – 2008 |
| Opel Signum 1.8 | 1796cc 90KW 122HP Z 18 XE | 2003 – 2005 |
| Opel Signum 2.0 Turbo | 1998cc 129KW 175HP Z 20 NET | 2003 – 2008 |
| Opel Signum 3.2 V6 | 3175cc 155KW 211HP Z 32 SE | 2003 – 2005 |
| Opel Signum 3.0 V6 CDTI | 2958cc 130KW 177HP Y 30 DT | 2003 – 2005 |
| Vauxhall Signum 2.0 i Turbo | 1998cc 129KW 175HP Z 20 NET | 2003 – 2008 |
| Vauxhall Signum 2.0 DTI | 1994cc 74KW 100HP Y 20 DTH | 2003 – 2004 |
| Vauxhall Signum 2.2 DTI | 2172cc 92KW 125HP Y 22 DTR | 2003 – 2008 |
| Vauxhall Signum 2.2 i | 2198cc 114KW 155HP Z 22 YH | 2003 – 2008 |
| Vauxhall Signum 3.0 CDTi | 2958cc 130KW 177HP Y 30 DT | 2003 – 2008 |
| Vauxhall Signum 3.2 V6 | 3175cc 155KW 211HP Z 32 SE | 2003 – 2008 |
| Opel Signum 1.9 CDTi | 1910cc 88KW 120HP Z 19 DT | 2004 – 2008 |
| Opel Signum 1.9 CDTi | 1910cc 110KW 150HP Z 19 DTH | 2004 – 2008 |
| Vauxhall Signum 1.9 CDTi | 1910cc 88KW 120HP Z 19 DT | 2004 – 2008 |
| Vauxhall Signum 1.9 CDTI 16V | 1910cc 110KW 150HP Z 19 DTH | 2004 – 2008 |
| Opel Signum 2.8 V6 Turbo | 2792cc 169KW 230HP Z 28 NEL | 2005 – 2008 |
| Vauxhall Signum 2.8 V6 Turbo | 2792cc 169KW 230HP Z 28 NEL | 2005 – 2008 |
| Opel Signum 3.0 V6 CDTI | 2958cc 135KW 184HP Z 30 DT | 2005 – 2008 |
| Vauxhall Signum 3.0 V6 CDTI | 2959cc 135KW 184HP Z 30 DT | 2005 – 2008 |
| Opel Signum 1.8 | 1796cc 103KW 140HP Z 18 XER | 2005 – 2008 |
| Opel Signum 2.8 V6 Turbo | 2792cc 184KW 250HP Z 28 NET | 2006 – 2008 |
| Vauxhall Signum 1.8 | 1796cc 103KW 140HP Z 18 XER | 2005 – 2008 |
| Vauxhall Signum 1.8 | 1796cc 90KW 122HP Z 18 XE | 2003 – 2005 |
| Vauxhall Signum 2.8 V6 Turbo | 2792cc 184KW 250HP Z 28 NET | 2007 – 2008 |
