| Model | Year | Engine power | Displacement | Top speed | 0-100 km/h (0-62 mph) |
|---|---|---|---|---|---|
| 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 | - | - |
| Audi A6 Avant 2.4 | 2005 | 126 kW | 2393 ccm | 222 km/h | 9.5 s |
| Audi A6 Avant 2.4 Multitronic | 2005 | 126 kW | 2496 ccm | 220 km/h | 9.7 s |
| Audi A6 Avant 2.4 Quattro | 2005 | 126 kW | 2393 ccm | 218 km/h | 9.6 s |
| Audi A6 Avant 2.5 TDI | 2005 | 127 kW | 2393 ccm | 219 km/h | 9.1 s |
| Audi A6 Avant 2.5 TDI Quattro | 2005 | 133 kW | 2393 ccm | 221 km/h | 9.1 s |
| Audi A6 Avant 2.7 T Quattro | 2005 | 187 kW | 2671 ccm | 241 km/h | 7 s |
| Audi A6 Avant 2.7 TDI | 2005 | 133 kW | 2698 ccm | 225 km/h | 8.3 s |
| Audi A6 Avant 3.0 | 2005 | 165 kW | 2976 ccm | 241 km/h | 7.7 s |
