| Model | Year | Engine power | Displacement | Top speed | 0-100 km/h (0-62 mph) |
|---|---|---|---|---|---|
| Audi A6 2.5 TDI Multitronic | 2005 | 121 kW | 2496 ccm | 217 km/h | 9.3 s |
| Audi A6 2.7 D | 2005 | 135 kW | 2669 ccm | 225 km/h | - |
| Audi A6 2.7 T Quattro Tiptronic | 2005 | 184 kW | 2671 ccm | 243 km/h | 6.8 s |
| Audi A6 3.0 Multitronic | 2005 | 162 kW | 2967 ccm | 241 km/h | 7.7 s |
| Audi A6 3.0 Quattro | 2005 | 162 kW | 2976 ccm | 241 km/h | 8 s |
| Audi A6 3.0 Quattro Tiptronic | 2005 | 162 kW | 2976 ccm | 241 km/h | 8 s |
| Audi A6 3.0 TDI Quattro | 2005 | 165 kW | 2967 ccm | 243 km/h | 7.3 s |
| Audi A6 3.2 FSI | 2005 | 188 kW | 3121 ccm | 250 km/h | 6.9 s |
| Audi A6 3.2 FSi Multitronic | 2005 | 188 kW | 2965 ccm | 250 km/h | 7 s |
| Audi A6 3.2 FSI Quattro | 2005 | 188 kW | 3123 ccm | 250 km/h | 7.1 s |
| Audi A6 3.2 Tiptronic | 2005 | 191 kW | 2983 ccm | - | - |
| Audi A6 4.2 Quattro | 2005 | 221 kW | 4179 ccm | - | 6.9 s |
| Audi A6 4.2 Quattro Tiptronic | 2005 | 221 kW | 4172 ccm | 250 km/h | 6.9 s |
| Audi A6 4.2 Tiptronic | 2005 | 251 kW | 4163 ccm | - | - |
| Audi A6 All Road | 2005 | 184 kW | 2671 ccm | - | - |
| Audi A6 Avant 1.8 T | 2005 | 111 kW | 1781 ccm | 209 km/h | 9.9 s |
| Audi A6 Avant 1.8 T Quattro | 2005 | 111 kW | 1779 ccm | 212 km/h | 10 s |
| Audi A6 Avant 1.9 TDI | 2005 | 96 kW | 1984 ccm | - | 10.7 s |
| Audi A6 Avant 2.0 | 2005 | 97 kW | 1968 ccm | 203 km/h | 10.7 s |
| Audi A6 Avant 2.0 D | 2005 | 103 kW | 1982 ccm | - | - |
