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Audi A6 2008 fuel consumption

Audi A6 from 2008 to 2012 real fuel consumption according to user reports is approximately 22% higher compared to advertised fuel consumption. For petrol engines real consumption is in average 24% higher, but for diesel engines is approximately 20% higher. Starting from 2008 Audi A6 average difference between actual owner-reported fuel consumption and stated consumption was significantly higher than average, at 2012 difference between owner-reported and advertised fuel economy became less than industry average. For more details, see the table below.

Year-to-year deviations of actual owner-reported average fuel consumption from advertised values

YearGasoline carsDiesel cars
All carmakersAudi A6All carmakersAudi A6
2008+12%+25% +13%+20%
Show all years
2009+14%+25% +14%+20%
2010+16%+25% +16%+20%
2011+19%+25% +19%+20%
2012+21%+21% +23%+12%

See below for the actual consumption of generations and versions of Audi A6.

2008 - 2011

Audi A6 2008 Avant wagon fuel economy

Average advertised fuel consumption for petrol engines27.1 MPG
8.7 l/100km
Average real-world fuel consumption for petrol engines21.3 MPG
11.0 l/100km
Average real gasoline consumption difference *+27%
Average advertised fuel consumption for diesel engines36.8 MPG
6.4 l/100km
Average real-world fuel consumption for diesel engines30.3 MPG
7.8 l/100km
Average real diesel consumption difference *+21%

According to advertised fuel consumption, a Audi A6 2008 with automatic transmission consumes on average 0.4 liters per 100 km or 6% more fuel than similar versions with manual gearbox. Based on user-reported real-world fuel consumption, this generation Audi A6 with automatic transmission consumes around 0.5 litres per 100 km or 8% more fuel than a version with the same engine but a manual gearbox.

Compared to similar cars of other manufacturers, the Audi A6 advertised fuel economy is significantly above average, but according to available user reports on actual consumption, real fuel economy is slightly worse than average.
The best real fuel economy in its class according to user reviews of all the modifications has modification with 4.2 petrol engine and automatic transmission (Audi A6 2008 Avant 4.2 FSI quattro 350 HP 4x4). However, of all modifications the best advertised fuel economy in its class has Audi A6 with 2.8 petrol engine and manual transmission (Audi A6 2008 Avant 2.8 FSI quattro 190 HP 4x4).

ModificationClaimed consumptionReal consumption
2.0 liter petrol engine
Audi A6 2008 Avant 2.0 T FSI 170 HP manual 31.4 MPG
7.5 l/100km
25.3 MPG
9.3 l/100km+24%
Audi A6 2008 Avant 2.0 T FSI 170 HP automatic 30.2 MPG
7.8 l/100km
22.0 MPG
10.7 l/100km+37%
2.0 liter diesel engine
Audi A6 2008 Avant 2.0 TDI 136 HP manual 44.4 MPG
5.3 l/100km
36.2 MPG
6.5 l/100km+23%
Audi A6 2008 Avant 2.0 TDI 136 HP automatic 39.9 MPG
5.9 l/100km
32.7 MPG
7.2 l/100km+22%
2.7 liter diesel engine
Audi A6 2008 Avant 2.7 TDI 190 HP manual 37.9 MPG
6.2 l/100km
31.8 MPG
7.4 l/100km+19%
Audi A6 2008 Avant 2.7 TDI 190 HP automatic 36.2 MPG
6.5 l/100km
28.7 MPG
8.2 l/100km+26%
Audi A6 2008 Avant 2.7 TDI quattro 190 HP 4x4 automatic 33.1 MPG
7.1 l/100km
28.7 MPG
8.2 l/100km+15%
2.8 liter petrol engine
Audi A6 2008 Avant 2.8 FSI 190 HP manual 28.3 MPG
8.3 l/100km
20.6 MPG
11.4 l/100km+37%
Audi A6 2008 Avant 2.8 FSI 190 HP automatic 27.4 MPG
8.6 l/100km
22.6 MPG
10.4 l/100km+21%
Audi A6 2008 Avant 2.8 FSI quattro 190 HP 4x4 manual 27.0 MPG
8.7 l/100km
20.6 MPG
11.4 l/100km+31%
Audi A6 2008 Avant 2.8 FSI 220 HP automatic 27.7 MPG
8.5 l/100km
22.4 MPG
10.5 l/100km+24%
Audi A6 2008 Avant 2.8 FSI quattro 220 HP 4x4 automatic 25.8 MPG
9.1 l/100km
22.4 MPG
10.5 l/100km+15%
3.0 liter petrol engine
Audi A6 2008 Avant 3.0 T FSI quattro 290 HP 4x4 automatic 24.8 MPG
9.5 l/100km
19.1 MPG
12.3 l/100km+29%
3.0 liter diesel engine
Audi A6 2008 Avant 3.0 TDI quattro 240 HP 4x4 manual 35.1 MPG
6.7 l/100km
29.4 MPG
8.0 l/100km+19%
Audi A6 2008 Avant 3.0 TDI quattro 240 HP 4x4 automatic 33.1 MPG
7.1 l/100km
26.7 MPG
8.8 l/100km+24%
4.2 liter petrol engine
Audi A6 2008 Avant 4.2 FSI quattro 350 HP 4x4 automatic 23.1 MPG
10.2 l/100km
18.5 MPG
12.7 l/100km+25%
2008 - 2012

Audi A6 2008 Allroad wagon fuel economy

Average advertised fuel consumption for petrol engines22.7 MPG
10.4 l/100km
Average real-world fuel consumption for petrol engines18.8 MPG
12.5 l/100km
Average real gasoline consumption difference *+21%
Average advertised fuel consumption for diesel engines31.6 MPG
7.4 l/100km
Average real-world fuel consumption for diesel engines28.2 MPG
8.3 l/100km
Average real diesel consumption difference *+12%

According to advertised fuel consumption, a Audi A6 2008 with automatic transmission consumes on average 0.3 liters per 100 km or 4% more fuel than similar versions with manual gearbox. Based on user-reported real-world fuel consumption, this generation Audi A6 with automatic transmission consumes around 0.8 litres per 100 km or 10% more fuel than a version with the same engine but a manual gearbox.

Compared to similar cars from other manufacturers, the Audi A6 fuel economy is slightly worse than average. The best fuel economy in its class of all the modifications has one with 4.2 petrol engine and automatic transmission (Audi A6 2008 allroad quattro 4.2 FSI 350 HP 4x4).

ModificationClaimed consumptionReal consumption
2.7 liter diesel engine
Audi A6 2008 allroad quattro 2.7 TDI 190 HP 4x4 automatic 30.9 MPG
7.6 l/100km
28.7 MPG
8.2 l/100km+8%
3.0 liter petrol engine
Audi A6 2008 allroad quattro 3.0 TFSI 290 HP 4x4 automatic 24.2 MPG
9.7 l/100km
19.1 MPG
12.3 l/100km+27%
3.0 liter diesel engine
Audi A6 2008 allroad quattro 3.0 TDI 240 HP 4x4 manual 32.7 MPG
7.2 l/100km
29.4 MPG
8.0 l/100km+11%
Audi A6 2008 allroad quattro 3.0 TDI 240 HP 4x4 automatic 31.4 MPG
7.5 l/100km
26.7 MPG
8.8 l/100km+17%
4.2 liter petrol engine
Audi A6 2008 allroad quattro 4.2 FSI 350 HP 4x4 automatic 21.4 MPG
11.0 l/100km
18.5 MPG
12.7 l/100km+15%
2008 - 2011

Audi A6 2008 sedan fuel economy

Average advertised fuel consumption for petrol engines26.5 MPG
8.9 l/100km
Average real-world fuel consumption for petrol engines21.4 MPG
11.0 l/100km
Average real gasoline consumption difference *+24%
Average advertised fuel consumption for diesel engines36.9 MPG
6.4 l/100km
Average real-world fuel consumption for diesel engines30.3 MPG
7.8 l/100km
Average real diesel consumption difference *+22%

According to advertised fuel consumption, a Audi A6 2008 with automatic transmission consumes on average 0.3 liters per 100 km or 5% more fuel than similar versions with manual gearbox. Based on user-reported real-world fuel consumption, this generation Audi A6 with automatic transmission consumes around 0.9 litres per 100 km or 10% more fuel than a version with the same engine but a manual gearbox.

Compared to similar cars of other manufacturers, the Audi A6 advertised fuel economy is significantly above average, but according to available user reports on actual consumption, real fuel economy is slightly worse than average.
The best real fuel economy in its class according to user reviews of all the modifications has modification with 4.2 petrol engine and automatic transmission (Audi A6 2008 4.2 FSI quattro 350 HP 4x4). However, of all modifications the best advertised fuel economy in its class has Audi A6 with 2.8 petrol engine and automatic transmission (Audi A6 2008 2.8 FSI 190 HP).

ModificationClaimed consumptionReal consumption
2.0 liter petrol engine
Audi A6 2008 2.0 TFSI 170 HP manual 31.4 MPG
7.5 l/100km
25.3 MPG
9.3 l/100km+24%
Audi A6 2008 2.0 TFSI 170 HP automatic 30.5 MPG
7.7 l/100km
21.8 MPG
10.8 l/100km+40%
2.0 liter diesel engine
Audi A6 2008 2.0 TDI 136 HP manual 44.4 MPG
5.3 l/100km
36.2 MPG
6.5 l/100km+23%
Audi A6 2008 2.0 TDI 136 HP automatic 40.6 MPG
5.8 l/100km
32.7 MPG
7.2 l/100km+24%
2.7 liter diesel engine
Audi A6 2008 2.7 TDI 190 HP manual 37.9 MPG
6.2 l/100km
31.8 MPG
7.4 l/100km+19%
Audi A6 2008 2.7 TDI 190 HP automatic 36.8 MPG
6.4 l/100km
30.2 MPG
7.8 l/100km+22%
Audi A6 2008 2.7 TDI quattro 190 HP 4x4 automatic 33.1 MPG
7.1 l/100km
27.0 MPG
8.7 l/100km+23%
2.8 liter petrol engine
Audi A6 2008 2.8 FSI 190 HP manual 28.7 MPG
8.2 l/100km
25.0 MPG
9.4 l/100km+15%
Audi A6 2008 2.8 FSI 190 HP automatic 28.0 MPG
8.4 l/100km
22.8 MPG
10.3 l/100km+23%
Audi A6 2008 2.8 FSI quattro 190 HP 4x4 manual 21.4 MPG
11.0 l/100km
17.7 MPG
13.3 l/100km+21%
Audi A6 2008 2.8 FSI 220 HP automatic 28.0 MPG
8.4 l/100km
22.4 MPG
10.5 l/100km+25%
Audi A6 2008 2.8 FSI quattro 220 HP 4x4 automatic 26.1 MPG
9.0 l/100km
22.4 MPG
10.5 l/100km+17%
3.0 liter petrol engine
Audi A6 2008 3.0 TFSI quattro 290 HP 4x4 automatic 25.0 MPG
9.4 l/100km
19.1 MPG
12.3 l/100km+31%
3.0 liter diesel engine
Audi A6 2008 3.0 TDI quattro 240 HP 4x4 manual 35.1 MPG
6.7 l/100km
29.4 MPG
8.0 l/100km+19%
Audi A6 2008 3.0 TDI quattro 240 HP 4x4 automatic 33.1 MPG
7.1 l/100km
26.7 MPG
8.8 l/100km+24%
4.2 liter petrol engine
Audi A6 2008 4.2 FSI quattro 350 HP 4x4 automatic 23.1 MPG
10.2 l/100km
18.5 MPG
12.7 l/100km+25%

* - Difference between advertised and user reported fuel economy has been calculated taking into account only those car versions for which information is available both on the fuel consumption specified by the manufacturer and reported by users.

User-reported fuel consumption may not accurately represent all users' experiences due to variables such as driving conditions, driving style, technical condition of the vehicle, and other circumstances. Thus, it should not be relied upon as a representative indicator.