| Model | Årgang | Motor | HK | Km/t | CO2 |
|---|---|---|---|---|---|
| C6 2.7 V6 HDi | 2012 | 2720 ccm | 207 | 230 | - |
| C6 3.0 V6 | 2012 | 2946 ccm | 215 | 230 | - |
| C6 Exclusive | 2012 | 2993 ccm | 215 | 230 | - |
| C6 2.7 V6 HDi | 2011 | 2720 ccm | 207 | 230 | - |
| C6 3.0 V6 | 2011 | 2946 ccm | 215 | 230 | - |
| C6 Exclusive | 2011 | 2993 ccm | 215 | 230 | - |
| C6 2.7 V6 HDi | 2010 | 2720 ccm | 207 | 230 | - |
| C6 3.0 V6 | 2010 | 2946 ccm | 215 | 230 | - |
| C6 Exclusive | 2010 | 2993 ccm | 215 | 230 | - |
| C6 3.0 V6 | 2009 | 2946 ccm | 207 | 230 | 173.0 |
| C6 Exclusive | 2009 | 2993 ccm | - | - | - |
| C6 2.7 V6 HDi | 2009 | 2720 ccm | 200 | 230 | 169.0 |
| C6 2.2 HDi 170 | 2009 | 2179 ccm | 167 | 217 | 237.9 |
| C6 2.7 HDi | 2008 | 2720 ccm | 200 | 230 | 169.0 |
| C6 2.2 HDi 170 | 2008 | 2178 ccm | 167 | 217 | 169.0 |
| C6 3.0 | 2008 | 2946 ccm | 206 | 230 | 173.0 |
| C6 3 | 2008 | 2946 ccm | 214 | 230 | - |
| C6 3.0 V6 | 2007 | 2945 ccm | 206 | 230 | 173.0 |
| C6 2.2 HDi 170 | 2007 | 2179 ccm | 167 | - | - |
| C6 2.7 V6 HDi | 2007 | 2720 ccm | 200 | 230 | 169.0 |
| C6 3.0 V6 | 2006 | 2946 ccm | 206 | 230 | 173.0 |
| C6 | 2005 | 2946 ccm | 210 | - | - |
| C6 | 2005 | 2946 ccm | 218 | - | - |
| C6 3.0i V6 | 2005 | 2946 ccm | 208 | 230 | 266.0 |
| C6 V6 HDi 208 | 2005 | 2720 ccm | 201 | 230 | 266.0 |
| C6 2.7 D | 2005 | 2721 ccm | 203 | - | - |
| C6 G Saloon | 1931 | 2650 ccm | 50 | - | - |