| A6 C6 3.0 TFSI quattroSaloon | 2008 – 2011 | 3.0L CCAA | 299 hp (220 kW) | Petrol | All-wheel Drive |
| A6 C6 Avant 3.0 TFSI quattroEstate | 2008 – 2011 | 3.0L CCAA | 299 hp (220 kW) | Petrol | All-wheel Drive |
| A6 C6 3.2 FSISaloon | 2004 – 2009 | 3.1L AUK | 255 hp (188 kW) | Petrol | Front-Wheel Drive |
| A6 C6 3.2 FSISaloon | 2004 – 2009 | 3.1L BKH | 255 hp (188 kW) | Petrol | Front-Wheel Drive |
| A6 C6 3.2 FSI quattroSaloon | 2004 – 2008 | 3.1L AUK | 255 hp (188 kW) | Petrol | All-wheel Drive |
| A6 C6 3.2 FSI quattroSaloon | 2004 – 2008 | 3.1L BKH | 255 hp (188 kW) | Petrol | All-wheel Drive |
| A6 C6 3.0 TDI quattroSaloon | 2004 – 2006 | 3.0L BMK | 225 hp (165 kW) | Diesel | All-wheel Drive |
| A6 C6 3.0 TDI quattroSaloon | 2004 – 2011 | 3.0L BNG | 211 hp (155 kW) | Diesel | All-wheel Drive |
| A6 C6 3.0 TDI quattroSaloon | 2004 – 2011 | 3.0L CDYB | 211 hp (155 kW) | Diesel | All-wheel Drive |
| A6 C6 2.7 TDISaloon | 2004 – 2008 | 2.7L BPP | 180 hp (132 kW) | Diesel | Front-Wheel Drive |
| A6 C6 2.7 TDISaloon | 2004 – 2011 | 2.7L BSG | 163 hp (120 kW) | Diesel | Front-Wheel Drive |
| A6 C6 2.7 TDISaloon | 2004 – 2011 | 2.7L CANB | 163 hp (120 kW) | Diesel | Front-Wheel Drive |
| A6 C6 Avant 2.7 TDIEstate | 2005 – 2011 | 2.7L BSG | 163 hp (120 kW) | Diesel | Front-Wheel Drive |
| A6 C6 Avant 2.7 TDIEstate | 2005 – 2011 | 2.7L CANB | 163 hp (120 kW) | Diesel | Front-Wheel Drive |
| A6 C6 Avant 3.0 TDI quattroEstate | 2005 – 2006 | 3.0L BMK | 225 hp (165 kW) | Diesel | All-wheel Drive |
| A6 C6 Avant 3.2 FSIEstate | 2005 – 2008 | 3.1L AUK | 255 hp (188 kW) | Petrol | Front-Wheel Drive |
| A6 C6 Avant 3.2 FSI quattroEstate | 2005 – 2008 | 3.1L AUK | 255 hp (188 kW) | Petrol | All-wheel Drive |
| A6 C6 Avant 3.2 FSI quattroEstate | 2005 – 2008 | 3.1L BKH | 255 hp (188 kW) | Petrol | All-wheel Drive |
| A6 C6 Avant 3.0 TDI quattroEstate | 2005 – 2011 | 3.0L BNG | 211 hp (155 kW) | Diesel | All-wheel Drive |
| A6 C6 Avant 3.0 TDI quattroEstate | 2005 – 2011 | 3.0L CDYB | 211 hp (155 kW) | Diesel | All-wheel Drive |
| A6 C6 Avant 2.7 TDIEstate | 2005 – 2008 | 2.7L BPP | 180 hp (132 kW) | Diesel | Front-Wheel Drive |
| A6 C6 Avant 2.7 TDI quattroEstate | 2004 – 2008 | 2.7L BPP | 180 hp (132 kW) | Diesel | All-wheel Drive |
| A6 C6 2.7 TDI quattroSaloon | 2004 – 2008 | 2.7L BPP | 180 hp (132 kW) | Diesel | All-wheel Drive |
| A6 C6 2.7 TDI quattroSaloon | 2005 – 2011 | 2.7L BSG | 163 hp (120 kW) | Diesel | All-wheel Drive |
| A6 C6 2.7 TDI quattroSaloon | 2005 – 2011 | 2.7L CAND | 163 hp (120 kW) | Diesel | All-wheel Drive |
| A6 C6 Avant 2.7 TDI quattroEstate | 2005 – 2011 | 2.7L BSG | 163 hp (120 kW) | Diesel | All-wheel Drive |
| A6 C6 Avant 2.7 TDI quattroEstate | 2005 – 2011 | 2.7L CAND | 163 hp (120 kW) | Diesel | All-wheel Drive |
| A6 Allroad C6 3.2 FSI quattroEstate | 2006 – 2008 | 3.1L AUK | 255 hp (188 kW) | Petrol | All-wheel Drive |
| A6 Allroad C6 4.2 FSI quattroEstate | 2006 – 2010 | 4.2L BVJ | 340 hp (250 kW) | Petrol | All-wheel Drive |
| A6 Allroad C6 3.0 TDI quattroEstate | 2006 – 2008 | 3.0L ASB | 233 hp (171 kW) | Diesel | All-wheel Drive |
| A6 Allroad C6 2.7 TDI quattroEstate | 2006 – 2008 | 2.7L BPP | 180 hp (132 kW) | Diesel | All-wheel Drive |
| A6 C6 3.0 TDI quattroSaloon | 2006 – 2008 | 3.0L ASB | 233 hp (171 kW) | Diesel | All-wheel Drive |
| A6 C6 Avant 3.0 TDI quattroEstate | 2006 – 2008 | 3.0L ASB | 233 hp (171 kW) | Diesel | All-wheel Drive |
| A6 C6 2.8 FSISaloon | 2006 – 2008 | 2.8L BDX | 210 hp (154 kW) | Petrol | Front-Wheel Drive |
| A6 C6 Avant 2.8 FSIEstate | 2006 – 2008 | 2.8L BDX | 210 hp (154 kW) | Petrol | Front-Wheel Drive |
| A6 Allroad C6 3.0 TDI quattroEstate | 2006 – 2011 | 3.0L BNG | 211 hp (155 kW) | Diesel | All-wheel Drive |
| A6 Allroad C6 3.0 TDI quattroEstate | 2006 – 2011 | 3.0L CDYB | 211 hp (155 kW) | Diesel | All-wheel Drive |
| A6 Allroad C6 2.7 TDI quattroEstate | 2006 – 2011 | 2.7L BSG | 163 hp (120 kW) | Diesel | All-wheel Drive |
| A6 Allroad C6 2.7 TDI quattroEstate | 2006 – 2011 | 2.7L CAND | 163 hp (120 kW) | Diesel | All-wheel Drive |
| A6 C6 2.8 FSI quattroSaloon | 2007 – 2008 | 2.8L BDX | 210 hp (154 kW) | Petrol | All-wheel Drive |
| A6 C6 Avant 2.8 FSI quattroEstate | 2007 – 2008 | 2.8L BDX | 210 hp (154 kW) | Petrol | All-wheel Drive |
| A6 C6 2.7 TDISaloon | 2008 – 2011 | 2.7L CANA | 190 hp (140 kW) | Diesel | Front-Wheel Drive |
| A6 C6 2.8 FSI quattroSaloon | 2008 – 2011 | 2.8L CCDA | 190 hp (140 kW) | Petrol | All-wheel Drive |
| A6 C6 2.8 FSI quattroSaloon | 2008 – 2011 | 2.8L CCEA | 220 hp (162 kW) | Petrol | All-wheel Drive |
| A6 C6 3.0 TDI quattroSaloon | 2008 – 2011 | 3.0L CDYA | 240 hp (176 kW) | Diesel | All-wheel Drive |
| A6 C6 3.0 TDI quattroSaloon | 2008 – 2011 | 3.0L CDYC | 240 hp (176 kW) | Diesel | All-wheel Drive |
| A6 C6 3.0 TFSI quattroSaloon | 2008 – 2011 | 3.0L CAJA | 290 hp (213 kW) | Petrol | All-wheel Drive |
| A6 C6 Avant 2.7 TDIEstate | 2008 – 2011 | 2.7L CANA | 190 hp (140 kW) | Diesel | Front-Wheel Drive |
| A6 C6 Avant 2.8 FSI quattroEstate | 2008 – 2011 | 2.8L CCDA | 190 hp (140 kW) | Petrol | All-wheel Drive |
| A6 C6 Avant 2.8 FSI quattroEstate | 2008 – 2011 | 2.8L CCEA | 220 hp (162 kW) | Petrol | All-wheel Drive |
| A6 C6 Avant 3.0 TDI quattroEstate | 2008 – 2011 | 3.0L CDYA | 240 hp (176 kW) | Diesel | All-wheel Drive |
| A6 C6 Avant 3.0 TDI quattroEstate | 2008 – 2011 | 3.0L CDYC | 240 hp (176 kW) | Diesel | All-wheel Drive |
| A6 C6 Avant 3.0 TFSI quattroEstate | 2008 – 2011 | 3.0L CAJA | 290 hp (213 kW) | Petrol | All-wheel Drive |
| A6 Allroad C6 2.7 TDI quattroEstate | 2008 – 2011 | 2.7L CANC | 190 hp (140 kW) | Diesel | All-wheel Drive |
| A6 Allroad C6 3.0 TDI quattroEstate | 2008 – 2011 | 3.0L CDYA | 240 hp (176 kW) | Diesel | All-wheel Drive |
| A6 Allroad C6 3.0 TDI quattroEstate | 2008 – 2011 | 3.0L CDYC | 240 hp (176 kW) | Diesel | All-wheel Drive |
| A6 Allroad C6 3.0 TFSI quattroEstate | 2008 – 2011 | 3.0L CAJA | 290 hp (213 kW) | Petrol | All-wheel Drive |