Audi A6: NEDC figures, lists 2010–2015
195 versions of the Audi A6 in the Vehicle Certification Agency lists 2010–2015, with combined economy of 25.9–64.2 mpg.
All figures on this page come from the NEDC test. NEDC was the official test before WLTP. NEDC figures are noticeably more optimistic, so do not compare them with WLTP figures.
| Version | Fuel | Combined | L/100 km | CO₂ g/km | In lists |
|---|---|---|---|---|---|
| A6 Saloon 3.0 V6 TDI 218PS 7speed S tronic 17'' wheels · D7 · 2967 cc | Diesel | 60.1 mpg | 4.7 | 122 | 2015 |
| A6 Saloon 3.0 V6 TDI 218PS 7speed S tronic 18'' wheels · D7 · 2967 cc | Diesel | 60.1 mpg | 4.7 | 122 | 2015 |
| A6 Avant 3.0 V6 TDI 218PS 7speed S tronic 17'' wheels · D7 · 2967 cc | Diesel | 58.9 mpg | 4.8 | 125 | 2015 |
| A6 Avant 3.0 V6 TDI 218PS 7speed S tronic 18'' wheels · D7 · 2967 cc | Diesel | 58.9 mpg | 4.8 | 125 | 2015 |
| A6 Saloon 3.0 V6 TDI 218PS 7speed S tronic 19'' wheels · D7 · 2967 cc | Diesel | 58.9 mpg | 4.8 | 124 | 2015 |
| A6 Avant 3.0 V6 TDI 218PS 7speed S tronic 19'' wheels · D7 · 2967 cc | Diesel | 57.6 mpg | 4.9 | 127 | 2015 |
| A6 Saloon 2.0 TDI 177PS · M6 · 1968 cc | Diesel | 57.6 mpg | 4.9 | 129 | 2011–2015 |
| A6 Saloon 3.0 V6 TDI 218PS 7speed S tronic 20'' wheels · D7 · 2967 cc | Diesel | 57.6 mpg | 4.9 | 127 | 2015 |
| A6 Avant 2.0 TDI 177PS · M6 · 1968 cc | Diesel | 56.5 mpg | 5.0 | 132 | 2011–2015 |
| A6 Avant 3.0 V6 TDI 218PS 7speed S tronic 20'' wheels · D7 · 2967 cc | Diesel | 56.5 mpg | 5.0 | 130 | 2015 |
| A6 Saloon 2.0 TDI 177PS 8speed Multitronic · AV · 1968 cc | Diesel | 56.5 mpg | 5.0 | 132 | 2012–2015 |
| A6 Saloon 3.0 TDI 204PS 8speed Multitronic · AV · 2967 cc | Diesel | 55.5 mpg | 5.1 | 133 | 2015 |
| A6 Avant 2.0 TDI 177PS 8speed Multitronic · AV · 1968 cc | Diesel | 55.4 mpg | 5.1 | 135 | 2012–2015 |
| A6 Saloon 3.0 V6 TDI quattro 218PS 7speed S tronic 17'' wheels · QD7 · 2967 cc | Diesel | 55.4 mpg | 5.1 | 133 | 2015 |
| A6 Saloon 3.0 V6 TDI quattro 218PS 7speed S tronic 18'' wheels · QD7 · 2967 cc | Diesel | 55.4 mpg | 5.1 | 133 | 2015 |
| A6 Saloon 3.0 V6 TDI quattro 218PS 7speed S tronic 19'' wheels · QD7 · 2967 cc | Diesel | 55.4 mpg | 5.1 | 135 | 2015 |
| A6 Avant 3.0 TDI 204PS 8speed Multitronic · AV · 2967 cc | Diesel | 54.3 mpg | 5.2 | 136 | 2015 |
| A6 Saloon 3.0 V6 TDI quattro 218PS 7speed S tronic 20'' wheels · QD7 · 2967 cc | Diesel | 54.3 mpg | 5.2 | 138 | 2015 |
| A6 Avant 3.0 TDI 204PS · M6 · 2967 cc | Diesel | 53.3 mpg | 5.3 | 139 | 2015 |
| A6 Avant 3.0 V6 TDI quattro 218PS 7speed S tronic 17'' wheels · QD7 · 2967 cc | Diesel | 53.3 mpg | 5.3 | 138 | 2015 |
| A6 Avant 3.0 V6 TDI quattro 218PS 7speed S tronic 18'' wheels · QD7 · 2967 cc | Diesel | 53.3 mpg | 5.3 | 138 | 2015 |
| A6 Avant 3.0 V6 TDI quattro 218PS 7speed S tronic 19'' wheels · QD7 · 2967 cc | Diesel | 53.3 mpg | 5.3 | 140 | 2015 |
| A6 Saloon 3.0 TDI 204PS · M6 · 2967 cc | Diesel | 53.3 mpg | 5.3 | 139 | 2015 |
| A6 Avant 3.0 V6 TDI quattro 218PS 7speed S tronic 20'' wheels · QD7 · 2967 cc | Diesel | 52.3 mpg | 5.4 | 144 | 2015 |
| A6 Allroad 3.0 V6 TDI quattro 218PS 7speed S tronic · QD7 · 2967 cc | Diesel | 50.4 mpg | 5.6 | 149 | 2015 |
| A6 Saloon 3.0 V6 TDI quattro 204PS 7speed S tronic · QD7 · 1968 cc | Diesel | 49.6 mpg | 5.7 | 149 | 2015 |
| A6 Avant 3.0 V6 TDI quattro 204PS 7speed S tronic · QD7 · 2967 cc | Diesel | 48.7 mpg | 5.8 | 152 | 2015 |
| A6 Avant 3.0 TDI quattro 245PS 7speed S tronic · QD7 · 2967 cc | Diesel | 47.9 mpg | 5.9 | 156 | 2015 |
| A6 Saloon 3.0 TDI quattro 245PS 7speed S tronic · QD7 · 2967 cc | Diesel | 47.9 mpg | 5.9 | 156 | 2015 |
| A6 Saloon 3.0 V6 BiTDI quattro 320PS 8speed S tronic 17'' wheels · QD8 · 2967 cc | Diesel | 47.1 mpg | 6.0 | 159 | 2015 |
| A6 Saloon 3.0 V6 BiTDI quattro 320PS 8speed S tronic 18'' wheels · QD8 · 2967 cc | Diesel | 47.1 mpg | 6.0 | 159 | 2015 |
| A6 Allroad 3.0 TDI quattro V6 204PS 7speed S-Tronic · QD7 · 2967 cc | Diesel | 46.3 mpg | 6.1 | 159 | 2012–2015 |
| A6 Saloon 3.0 V6 BiTDI quattro 320PS 8speed S tronic 19'' wheels · QD8 · 2967 cc | Diesel | 46.3 mpg | 6.1 | 161 | 2015 |
| A6 Avant 3.0 V6 BiTDI quattro 320PS 8speed S tronic 17'' wheels · QD8 · 2967 cc | Diesel | 45.6 mpg | 6.2 | 164 | 2015 |
| A6 Avant 3.0 V6 BiTDI quattro 320PS 8speed S tronic 18'' wheels · QD8 · 2967 cc | Diesel | 45.6 mpg | 6.2 | 164 | 2015 |
| A6 Saloon 3.0 V6 BiTDI quattro 320PS 8speed S tronic 20'' wheels · QD8 · 2967 cc | Diesel | 45.6 mpg | 6.2 | 164 | 2015 |
| A6 Allroad 3.0 TDI quattro V6 245PS 7speed S-Tronic · QD7 · 2967 cc | Diesel | 44.8 mpg | 6.3 | 165 | 2012–2015 |
| A6 Avant 3.0 V6 BiTDI quattro 320PS 8speed S tronic 19'' wheels · QD8 · 2967 cc | Diesel | 44.8 mpg | 6.3 | 166 | 2015 |
| A6 Avant 3.0 V6 BiTDI quattro 313PS 8speed Tiptronic · QA8 · 2967 cc | Diesel | 44.1 mpg | 6.4 | 169 | 2015 |
| A6 Avant 3.0 V6 BiTDI quattro 320PS 8speed S tronic 20'' wheels · QD8 · 2967 cc | Diesel | 44.1 mpg | 6.4 | 169 | 2015 |
| A6 Saloon 3.0 V6 BiTDI quattro 313PS 8speed Tiptronic · QA8 · 2967 cc | Diesel | 44.1 mpg | 6.4 | 169 | 2015 |
| A6 Allroad 3.0 V6 BiTDI quattro 320PS 8speed S tronic · QD8 · 2967 cc | Diesel | 43.5 mpg | 6.5 | 172 | 2015 |
| A6 Allroad 3.0 V6 BiTDI quattro 313PS 8speed Tiptronic · QA8 · 2967 cc | Diesel | 42.2 mpg | 6.7 | 176 | 2015 |
| A6 Avant 3.0 TFSI quattro 310PS 7speed S-Tronic · QD7 · 2995 cc | Petrol | 34.4 mpg | 8.2 | 190 | 2012–2015 |
| A6 Saloon 3.0 TFSI quattro 310PS 7speed S tronic · QD7 · 2995 cc | Petrol | 34.4 mpg | 8.2 | 190 | 2015 |
| A6 Allroad 3.0 TFSI V6 quattro 310PS 7speed S tronic · QD7 · 2995 cc | Petrol | 31.7 mpg | 8.9 | 206 | 2015 |
| A6 Saloon S6 4.0 TFSI V8 quattro 420PS 7speed S-Tronic · QD7 · 3993 cc | Petrol | 29.4 mpg | 9.6 | 225 | 2012–2015 |
| A6 Avant S6 4.0 TFSI V8 quattro 420PS 7speed S-Tronic · QD7 · 3993 cc | Petrol | 29.1 mpg | 9.7 | 226 | 2012–2015 |
| A6 Saloon 2.0 TDI (190ps) ULTRA 7speed S-tronic · D7 · 1968 cc | Diesel | 64.2 mpg | 4.4 | 114 | 2014 |
| A6 Saloon 2.0 TDI (190ps) ULTRA · M6 · 1968 cc | Diesel | 62.8 mpg | 4.5 | 117 | 2014 |
| A6 Avant 2.0 TDI 190PS Ultra · M6 · 1968 cc | Diesel | 61.4 mpg | 4.6 | 119 | 2014 |
| A6 Avant 2.0 TDI 190PS Ultra S-tronic · D7 · 1968 cc | Diesel | 61.4 mpg | 4.6 | 119 | 2014 |
| A6 Saloon 2.0 TDI 177PS · Manual · 1968 cc | Diesel | 57.6 mpg | 4.9 | 129 | 2013–2014 |
| A6 Avant 2.0 TDI 177PS · Manual · 1968 cc | Diesel | 56.5 mpg | 5.0 | 132 | 2013–2014 |
| A6 Saloon 2.0 TDI 177PS 8speed Multitronic · Automatic · 1968 cc | Diesel | 56.5 mpg | 5.0 | 132 | 2013–2014 |
| A6 Saloon 3.0 TDI 204PS 8speed Multitronic · Automatic · 2967 cc | Diesel | 55.5 mpg | 5.1 | 133 | 2013–2014 |
| A6 Avant 2.0 TDI 177PS 8speed Multitronic · Automatic · 1968 cc | Diesel | 55.4 mpg | 5.1 | 135 | 2013–2014 |
| A6 Avant 3.0 TDI 204PS 8speed Multitronic · Automatic · 2967 cc | Diesel | 54.3 mpg | 5.2 | 136 | 2013–2014 |
| A6 Avant 3.0 TDI 204PS · Manual · 2967 cc | Diesel | 53.3 mpg | 5.3 | 139 | 2013–2014 |
| A6 Saloon 3.0 TDI 204PS · Manual · 2967 cc | Diesel | 53.3 mpg | 5.3 | 139 | 2013–2014 |
| A6 Saloon 3.0 V6 TDI quattro 204PS S-tronic · Automatic · 1968 cc | Diesel | 49.6 mpg | 5.7 | 149 | 2014 |
| A6 Avant 3.0 V6 TDI quattro 204PS S-tronic · Automatic · 2967 cc | Diesel | 48.7 mpg | 5.8 | 152 | 2014 |
| A6 Avant 3.0 TDI quattro 245PS 7speed S-Tronic · Automatic · 2967 cc | Diesel | 47.9 mpg | 5.9 | 156 | 2013–2014 |
| A6 Saloon 3.0 TDI quattro 245PS 7speed S-Tronic · Automatic · 2967 cc | Diesel | 47.9 mpg | 5.9 | 156 | 2013–2014 |
| A6 Allroad 3.0 TDI quattro V6 204PS 7speed S-Tronic · Automatic · 2967 cc | Diesel | 46.3 mpg | 6.1 | 159 | 2013–2014 |
| A6 Allroad 3.0 TDI quattro V6 245PS 7speed S-Tronic · Automatic · 2967 cc | Diesel | 44.8 mpg | 6.3 | 165 | 2013–2014 |
| A6 Allroad 3.0 V6 TDI quattro 245PS S-tronic · QD7 · 2967 cc | Diesel | 44.8 mpg | 6.3 | 165 | 2014 |
| A6 Avant 3.0 V6 BiTDI quattro 313PS 8speed Tiptronic · Automatic · 2967 cc | Diesel | 44.1 mpg | 6.4 | 169 | 2013–2014 |
| A6 Saloon 3.0 V6 BiTDI quattro 313PS 8speed Tiptronic · Automatic · 2967 cc | Diesel | 44.1 mpg | 6.4 | 169 | 2013–2014 |
| A6 Allroad 3.0 V6 BiTDI quattro 313PS 8speed S-tronic · Automatic · 2967 cc | Diesel | 42.2 mpg | 6.7 | 176 | 2014 |
| A6 Saloon 2.0 TFSI Hybrid 245PS 8speed tiptronic · Automatic · 1984 cc | Hybrid | 45.6 mpg | 6.2 | 145 | 2014 |
| A6 Avant 3.0 TFSI quattro 310PS 7speed S-Tronic · Automatic · 2995 cc | Petrol | 34.4 mpg | 8.2 | 190 | 2013–2014 |
| A6 Saloon 3.0 TFSI quattro 310PS 7speed S-Tronic · Automatic · 2995 cc | Petrol | 34.4 mpg | 8.2 | 190 | 2013–2014 |
| A6 Allroad 3.0 TFSI V6 quattro 310PS 7speed S-Tronic · Automatic · 2995 cc | Petrol | 31.7 mpg | 8.9 | 206 | 2013–2014 |
| A6 Saloon S6 4.0 TFSI V8 quattro 420PS 7speed S-Tronic · Automatic · 3993 cc | Petrol | 29.4 mpg | 9.6 | 225 | 2013–2014 |
| A6 Avant S6 4.0 TFSI V8 quattro 420PS 7speed S-Tronic · Automatic · 3993 cc | Petrol | 29.1 mpg | 9.7 | 226 | 2013–2014 |
| A6 Allroad 3.0 V6 BiTDI quattro 313PS 8speed Tiptronic · Automatic · 2967 cc | Diesel | 42.2 mpg | 6.7 | 176 | 2013 |
| A6 Saloon 3.0 V6 TDI 204PS 8speed Multitronic · AV · 2967 cc | Diesel | 55.5 mpg | 5.1 | 133 | 2012 |
| A6 Avant 3.0 V6 TDI 204PS 8speed Multitronic · AV · 2967 cc | Diesel | 54.3 mpg | 5.2 | 136 | 2012 |
| A6 Avant 3.0 V6 TDI 204PS · M6 · 2967 cc | Diesel | 53.3 mpg | 5.3 | 139 | 2012 |
| A6 Saloon 3.0 V6 TDI 204PS · M6 · 2967 cc | Diesel | 53.3 mpg | 5.3 | 139 | 2012 |
| A6 Avant 3.0 V6 TDI quattro 245PS 7speed S-Tronic · QD7 · 2967 cc | Diesel | 47.9 mpg | 5.9 | 156 | 2012 |
| A6 Saloon 3.0 V6 TDI 245PS quattro 7speed S-Tronic · QD7 · 2967 cc | Diesel | 47.9 mpg | 5.9 | 156 | 2012 |
| A6 Avant 3.0 V6 BiTDI 313PS quattro 8speed Tiptronic · QA8 · 2967 cc | Diesel | 44.1 mpg | 6.4 | 169 | 2012 |
| A6 Saloon 3.0 V6 BiTDI 313PS quattro 8speed Tiptronic · QA8 · 2967 cc | Diesel | 44.1 mpg | 6.4 | 169 | 2012 |
| A6 Allroad 3.0 V6 BiTDI 313PS quattro 8speed Tiptronic · QA8 · 2967 cc | Diesel | 42.2 mpg | 6.7 | 176 | 2012 |
| A6 Saloon 3.0 TFSI 310PS quattro 7speed S-Tronic · QD7 · 2995 cc | Petrol | 34.4 mpg | 8.2 | 190 | 2012 |
| A6 Allroad 3.0 TFSI quattro V6 310PS 7speed S-Tronic · QD7 · 2995 cc | Petrol | 31.7 mpg | 8.9 | 206 | 2012 |
| A6 Saloon 2.0 TDI 177PS Multitronic · AV · 1968 cc | Diesel | 56.5 mpg | 5.0 | 132 | 2011 |
| A6 Saloon 3.0 TDI 204PS Multitronic · AV · 2967 cc | Diesel | 55.5 mpg | 5.1 | 133 | 2011 |
| A6 Avant 3.0 V6 TDI 204PS Multitronic · AV · 2967 cc | Diesel | 54.3 mpg | 5.2 | 136 | 2011 |
| A6 Avant 2.0 CR TDIe 136ps · M6 · 1968 cc | Diesel | 53.3 mpg | 5.3 | 139 | 2010–2011 |
| A6 Saloon 2.0 CR TDIe 136PS · M6 · 1968 cc | Diesel | 53.3 mpg | 5.3 | 139 | 2009–2011 |
| A6 Saloon 2.0 CR TDI 170PS · M6 · 1984 cc | Diesel | 49.6 mpg | 5.7 | 149 | 2009–2011 |
| A6 Avant 2.0 CR TDI 170PS · M6 · 1984 cc | Diesel | 48.7 mpg | 5.8 | 152 | 2011 |
| A6 Saloon 2.0 CR TDI 170PS Multitronic · AV · 1984 cc | Diesel | 48.7 mpg | 5.8 | 153 | 2009–2011 |
| A6 Saloon 2.0 TDI 136PS Multitronic · AV · 1968 cc | Diesel | 48.7 mpg | 5.8 | 151 | 2009–2011 |
| A6 Avant 2.0 CR TDI 170PS Multitronic · AV · 1984 cc | Diesel | 47.9 mpg | 5.9 | 154 | 2009–2011 |
| A6 Avant 2.0 TDI 136PS Multitronic · AV · 1968 cc | Diesel | 47.9 mpg | 5.9 | 155 | 2009–2011 |
| A6 Avant 3.0 V6 TDI 245PS quattro S-Tronic · QD7 · 2967 cc | Diesel | 47.9 mpg | 5.9 | 156 | 2011 |
| A6 Saloon 3.0 TDI 245PS quattro S-Tronic · D7 · 2967 cc | Diesel | 47.9 mpg | 5.9 | 156 | 2011 |
| A6 Avant 2.7 V6 TDI 190PS · M6 · 2698 cc | Diesel | 45.6 mpg | 6.2 | 164 | 2009–2011 |
| A6 Saloon 2.7 V6 TDI 190PS · M6 · 2698 cc | Diesel | 45.6 mpg | 6.2 | 164 | 2009–2011 |
| A6 Saloon 2.7 V6 TDI 190PS Multitronic · AV · 2698 cc | Diesel | 44.1 mpg | 6.4 | 169 | 2009–2011 |
| A6 Avant 2.7 TDI 190ps Multitronic · AV · 2698 cc | Diesel | 43.5 mpg | 6.5 | 172 | 2010–2011 |
| A6 Avant 3.0 V6 CR TDI 240PS quattro · QM6 · 2967 cc | Diesel | 42.2 mpg | 6.7 | 179 | 2011 |
| A6 Saloon 3.0 V6 CR TDI 240PS quattro · QM6 · 2967 cc | Diesel | 42.2 mpg | 6.7 | 179 | 2011 |
| A6 Saloon 3.0 V6 TDI 240PS quattro · QM6 · 2967 cc | Diesel | 42.2 mpg | 6.7 | 179 | 2011 |
| A6 Avant 2.7 V6 TDI 190PS quattro Tiptronic · QA6 · 2698 cc | Diesel | 39.8 mpg | 7.1 | 189 | 2011 |
| A6 Avant 3.0 V6 CR TDI 240PS quattro Tiptronic · QA6 · 2967 cc | Diesel | 39.8 mpg | 7.1 | 189 | 2011 |
| A6 Saloon 2.7 V6 TDI 190PS quattro Tiptronic · QA6 · 2698 cc | Diesel | 39.8 mpg | 7.1 | 189 | 2011 |
| A6 Saloon 3.0 V6 CR TDI 240PS quattro Tiptronic · QA6 · 2967 cc | Diesel | 39.8 mpg | 7.1 | 189 | 2011 |
| A6 Saloon 3.0 V6 TDI 190PS quattro Tiptronic · QA6 · 2967 cc | Diesel | 39.8 mpg | 7.1 | 189 | 2011 |
| A6 Allroad 3.0 V6 CR TDI 240PS quattro · QM6 · 2967 cc | Diesel | 39.2 mpg | 7.2 | 189 | 2011 |
| A6 Allroad 2.7 V6 TDI 190PS quattro Tiptronic · QA6 · 2698 cc | Diesel | 37.7 mpg | 7.5 | 199 | 2011 |
| A6 Allroad 3.0 V6 CR TDI 240PS quattro Tiptronic · QA6 · 2967 cc | Diesel | 37.7 mpg | 7.5 | 199 | 2011 |
| A6 Avant 2.0 TFSI 170PS · M6 · 1984 cc | Petrol | 37.7 mpg | 7.5 | 174 | 2009–2011 |
| A6 Saloon 2.0 TFSI 170PS · M6 · 1984 cc | Petrol | 37.7 mpg | 7.5 | 174 | 2009–2011 |
| A6 Saloon 2.0 TFSI 170PS Multitronic · AV · 1984 cc | Petrol | 36.7 mpg | 7.7 | 179 | 2009–2011 |
| A6 Avant 2.0 TFSI 170PS Multitronic · AV · 1984 cc | Petrol | 36.2 mpg | 7.8 | 181 | 2009–2011 |
| A6 Avant 3.0 V6 TDI 190PS quattro S-Tronic · QD7 · 2995 cc | Petrol | 34.4 mpg | 8.2 | 190 | 2011 |
| A6 Saloon 3.0 TFSI 300PS quattro S-Tronic · D7 · 2995 cc | Petrol | 34.4 mpg | 8.2 | 190 | 2011 |
| A6 Saloon 2.8 V6 FSI 220PS Multitronic · AV · 2773 cc | Petrol | 33.6 mpg | 8.4 | 196 | 2009–2011 |
| A6 Avant 2.8 V6 FSI 220ps Multitronic · AV · 2773 cc | Petrol | 32.8 mpg | 8.6 | 199 | 2010–2011 |
| A6 Saloon 2.8 V6 FSI quattro 220PS Tiptronic · QA6 · 2773 cc | Petrol | 31.4 mpg | 9.0 | 212 | 2009–2011 |
| A6 Avant 2.8 V6 FSI 220PS quattro Tiptronic · QA6 · 2773 cc | Petrol | 31.0 mpg | 9.1 | 214 | 2011 |
| A6 Saloon 3.0 V6 FSI 290PS quattro · QA6 · 2995 cc | Petrol | 30.1 mpg | 9.4 | 219 | 2011 |
| A6 Saloon 3.0 V6 FSI 290PS quattro Tiptronic · QA6 · 2995 cc | Petrol | 30.1 mpg | 9.4 | 219 | 2011 |
| A6 Avant 3.0 V6 FSI 290PS quattro · QA6 · 2995 cc | Petrol | 29.7 mpg | 9.5 | 223 | 2011 |
| A6 Avant 3.0 V6 FSI 290PS quattro Tiptronic · QA6 · 2995 cc | Petrol | 29.7 mpg | 9.5 | 223 | 2011 |
| A6 Allroad 3.0 V6 FSI 290PS quattro · QA6 · 2995 cc | Petrol | 29.1 mpg | 9.7 | 225 | 2011 |
| A6 Allroad 3.0 V6 FSI 290PS quattro Tiptronic · QA6 · 2995 cc | Petrol | 29.1 mpg | 9.7 | 225 | 2011 |
| A6 Avant 2.0 CR TDI 170PS · M6 · 1984 cc | Diesel | 58.9 mpg | 5.8 | 152 | 2009–2010 |
| A6 Saloon 2.0 TDI 140ps · M6 · 1968 cc | Diesel | 46.3 mpg | 6.1 | 159 | 2008–2010 |
| A6 Avant 2.0 TDI 140ps · M6 · 1968 cc | Diesel | 45.6 mpg | 6.2 | 162 | 2008–2010 |
| A6 Avant 2.0 TDI 140ps Multitronic with DPF · AV · 1968 cc | Diesel | 42.2 mpg | 6.7 | 178 | 2007–2010 |
| A6 Avant 3.0 V6 CR TDI quattro 240PS · QM6 · 2967 cc | Diesel | 42.2 mpg | 6.7 | 179 | 2009–2010 |
| A6 Saloon 2.0 TDI 140ps Multitronic with DPF · AV · 1968 cc | Diesel | 42.2 mpg | 6.7 | 178 | 2007–2010 |
| A6 Saloon 3.0 V6 CR TDI quattro 240PS · QM6 · 2967 cc | Diesel | 42.2 mpg | 6.7 | 179 | 2009–2010 |
| A6 Saloon 3.0 V6 quattro TDI 240PS · QM6 · 2967 cc | Diesel | 42.2 mpg | 6.7 | 179 | 2009–2010 |
| A6 Saloon 2.7 V6 TDI 180ps · M6 · 2698 cc | Diesel | 40.9 mpg | 6.9 | 184 | 2007–2010 |
| A6 Avant 2.7 V6 TDI 180ps · M6 · 2698 cc | Diesel | 39.8 mpg | 7.1 | 189 | 2007–2010 |
| A6 Avant 2.7 V6 TDI quattro 190ps Tiptronic · QA6 · 2698 cc | Diesel | 39.8 mpg | 7.1 | 189 | 2010 |
| A6 Avant 3.0 V6 CR TDI quattro 240ps Tiptronic · QA6 · 2967 cc | Diesel | 39.8 mpg | 7.1 | 189 | 2010 |
| A6 Saloon 2.7 V6 TDI quattro 190PS Tiptronic · QA6 · 2698 cc | Diesel | 39.8 mpg | 7.1 | 189 | 2009–2010 |
| A6 Saloon 3.0 V6 CR TDI quattro 240PS Tiptronic · QA6 · 2967 cc | Diesel | 39.8 mpg | 7.1 | 189 | 2009–2010 |
| A6 Saloon 3.0 V6 quattro TDI 190PS Tiptronic · QA6 · 2967 cc | Diesel | 39.8 mpg | 7.1 | 189 | 2009–2010 |
| A6 Allroad 3.0 V6 CR TDI quattro 240ps · QM6 · 2967 cc | Diesel | 39.2 mpg | 7.2 | 189 | 2010 |
| A6 Saloon 2.7 V6 TDI 180ps Multitronic · AV · 2698 cc | Diesel | 39.2 mpg | 7.2 | 192 | 2007–2010 |
| A6 Saloon 2.7 V6 TDI 180ps Multitronic with DPF · AV · 2698 cc | Diesel | 38.7 mpg | 7.3 | 194 | 2008–2010 |
| A6 Avant 2.7 V6 TDI 180ps Multitronic · AV · 2698 cc | Diesel | 38.2 mpg | 7.4 | 197 | 2007–2010 |
| A6 Allroad 2.7 V6 TDI quattro 190ps Tiptronic · QA6 · 2698 cc | Diesel | 37.7 mpg | 7.5 | 199 | 2010 |
| A6 Allroad 3.0 V6 CR TDI quattro 240ps Tiptronic · QA6 · 2967 cc | Diesel | 37.7 mpg | 7.5 | 199 | 2010 |
| A6 Avant 2.7 V6 TDI 180ps Multitronic with DPF · AV · 2698 cc | Diesel | 37.7 mpg | 7.5 | 199 | 2008–2010 |
| A6 Saloon 3.0 V6 TDI 233ps quattro · QM6 · 2967 cc | Diesel | 35.3 mpg | 8.0 | 213 | 2008–2010 |
| A6 Avant 3.0 V6 TDI 233ps quattro · QM6 · 2967 cc | Diesel | 34.9 mpg | 8.1 | 215 | 2008–2010 |
| A6 Saloon 3.0 V6 TDI 233ps quattro Tiptronic · QA6 · 2967 cc | Diesel | 34.0 mpg | 8.3 | 222 | 2008–2010 |
| A6 Avant 3.0 V6 TDI 233ps quattro Tiptronic · QA6 · 2967 cc | Diesel | 33.6 mpg | 8.4 | 225 | 2008–2010 |
| A6 Saloon 2.7 V6 TDI 180ps quattro Tiptronic · QA6 · 2698 cc | Diesel | 33.6 mpg | 8.4 | 222 | 2008–2010 |
| A6 Avant 2.7 V6 TDI 180ps quattro Tiptronic · QA6 · 2698 cc | Diesel | 33.2 mpg | 8.5 | 225 | 2008–2010 |
| A6 Saloon 2.0 TFSI 170ps · M6 · 1984 cc | Petrol | 35.8 mpg | 7.9 | 187 | 2008–2010 |
| A6 Avant 2.0 TFSI 170ps · M6 · 1984 cc | Petrol | 34.9 mpg | 8.1 | 192 | 2008–2010 |
| A6 Avant 2.0 TFSI 170ps Multitronic · AV · 1984 cc | Petrol | 34.4 mpg | 8.2 | 194 | 2008–2010 |
| A6 Saloon 2.0 TFSI 170ps Multitronic · AV · 1984 cc | Petrol | 34.4 mpg | 8.2 | 194 | 2008–2010 |
| A6 Saloon 2.8 V6 FSI 210ps · M6 · 2773 cc | Petrol | 32.5 mpg | 8.7 | 207 | 2007–2010 |
| A6 Avant 2.8 V6 FSI 210ps · M6 · 2773 cc | Petrol | 32.1 mpg | 8.8 | 209 | 2007–2010 |
| A6 Avant 2.8 V6 FSI 210ps Multitronic · AV · 2773 cc | Petrol | 32.1 mpg | 8.8 | 209 | 2007–2010 |
| A6 Saloon 2.8 V6 FSI 210ps Multitronic · AV · 2773 cc | Petrol | 32.1 mpg | 8.8 | 209 | 2007–2010 |
| A6 Avant 2.8 V6 FSI quattro 220PS Tiptronic · QA6 · 2773 cc | Petrol | 31.0 mpg | 9.1 | 214 | 2009–2010 |
| A6 Avant S6 5.2 V10 quattro 435ps Tiptronic · QA6 · 5204 cc | Petrol | 31.0 mpg | 12.6 | 299 | 2010 |
| A6 Saloon S6 5.2 V10 quattro 435ps Tiptronic · QA6 · 5204 cc | Petrol | 31.0 mpg | 12.6 | 299 | 2010 |
| A6 Saloon 3.0 V6 FSI quattro 290PS Tiptronic · QA6 · 2995 cc | Petrol | 30.1 mpg | 9.4 | 219 | 2009–2010 |
| A6 Saloon 3.0 V6 quattro FSI 290ps · QA6 · 2995 cc | Petrol | 30.1 mpg | 9.4 | 219 | 2010 |
| A6 Avant 3.0 V6 FSI quattro 290PS Tiptronic · QA6 · 2995 cc | Petrol | 29.7 mpg | 9.5 | 223 | 2009–2010 |
| A6 Avant 3.0 V6 quattro FSI 290ps · QA6 · 2995 cc | Petrol | 29.7 mpg | 9.5 | 223 | 2010 |
| A6 Avant 2.4 V6 177ps Multitronic · AV · 2393 cc | Petrol | 29.4 mpg | 9.6 | 229 | 2007–2010 |
| A6 Avant 3.2 V6 FSI 256ps Multitronic · AV · 3123 cc | Petrol | 29.4 mpg | 9.6 | 229 | 2007–2010 |
| A6 Saloon 2.4 V6 177ps Multitronic · AV · 2393 cc | Petrol | 29.4 mpg | 9.6 | 229 | 2007–2010 |
| A6 Saloon 3.2 V6 FSI 256ps Multitronic · AV · 3123 cc | Petrol | 29.4 mpg | 9.6 | 229 | 2007–2010 |
| A6 Allroad 3.0 V6 TFSI quattro 290ps Tiptronic · QA6 · 2995 cc | Petrol | 29.1 mpg | 9.7 | 225 | 2010 |
| A6 Allroad 3.0 V6 quattro FSI 290ps · QA6 · 2995 cc | Petrol | 29.1 mpg | 9.7 | 225 | 2010 |
| A6 Avant 2.8 V6 FSI 210ps quattro Tiptronic · QA6 · 2773 cc | Petrol | 29.1 mpg | 9.7 | 231 | 2008–2010 |
| A6 Saloon 2.4 V6 177ps · M6 · 2393 cc | Petrol | 29.1 mpg | 9.7 | 231 | 2008–2010 |
| A6 Saloon 2.8 V6 FSI 210ps quattro Tiptronic · QA6 · 2773 cc | Petrol | 29.1 mpg | 9.7 | 231 | 2008–2010 |
| A6 Saloon 3.2 V6 FSI 256ps · M6 · 3123 cc | Petrol | 29.1 mpg | 9.7 | 231 | 2008–2010 |
| A6 Avant 3.2 V6 FSI 256ps · M6 · 3123 cc | Petrol | 28.8 mpg | 9.8 | 233 | 2008–2010 |
| A6 Avant 2.4 V6 177ps · M6 · 2393 cc | Petrol | 28.5 mpg | 9.8 | 233 | 2008–2010 |
| A6 Saloon 3.2 V6 FSI 256ps quattro · QM6 · 3123 cc | Petrol | 26.4 mpg | 10.7 | 255 | 2007–2010 |
| A6 Avant 3.2 V6 FSI 256ps quattro · QM6 · 3123 cc | Petrol | 26.2 mpg | 10.8 | 257 | 2007–2010 |
| A6 Saloon 4.2 V8 FSI 350ps quattro Tiptronic · QA6 · 4163 cc | Petrol | 26.2 mpg | 10.8 | 257 | 2007–2010 |
| A6 Avant 2.4 V6 177ps quattro · QM6 · 2393 cc | Petrol | 25.9 mpg | 10.9 | 259 | 2008–2010 |
| A6 Avant 3.2 V6 FSI 256ps quattro Tiptronic · QA6 · 3123 cc | Petrol | 25.9 mpg | 10.9 | 259 | 2008–2010 |
| A6 Avant 4.2 V8 FSI 350ps quattro Tiptronic · QA6 · 4163 cc | Petrol | 25.9 mpg | 10.9 | 259 | 2007–2010 |
| A6 Saloon 2.4 V6 177ps quattro · QM6 · 2393 cc | Petrol | 25.9 mpg | 10.8 | 257 | 2008–2010 |
| A6 Saloon 3.2 V6 FSI 256ps quattro Tiptronic · QA6 · 3123 cc | Petrol | 25.9 mpg | 10.9 | 259 | 2008–2010 |
Source: Vehicle Certification Agency (VCA), Car Fuel Data — official data download (lists 2000–2026, downloaded 2026-10-22). © Crown copyright, reused under the licence published for this dataset on data.gov.uk (Creative Commons Attribution). Data processed by us (duplicates merged, model names tidied); the VCA is not responsible for our use of it. The VCA states that figures are supplied by manufacturers, may not be achieved in real-world driving, and are used at the user's own risk.