Audi A8 1999 fuel consumption

Audi A8 from 1999 to 2002 real fuel consumption according to user reports is approximately 13% higher compared to advertised fuel consumption. For petrol engines real consumption is in average 12% higher, but for diesel engines is approximately 15% higher. Starting from 1999 Audi A8 average difference between actual owner-reported fuel consumption and stated consumption was slightly above industry average, at 2000 it was similar to average, at 2001 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

Year	Gasoline cars		Diesel cars
Year	All carmakers	Audi A8	All carmakers	Audi A8
1999	+3%	+5%	+5%	insignificant
Show all years
2000	+4%	+4%	+5%	insignificant
2001	+5%	+4%	+6%	insignificant
2002	+6%	+4%	+7%	insignificant

See below for the actual consumption of generations and versions of Audi A8.

1999 - 2002

Audi A8 1999 fuel economy

Average advertised fuel consumption for petrol engines	19.2 MPG 12.2 l/100km
Average real-world fuel consumption for petrol engines	20.0 MPG 11.8 l/100km
Average real gasoline consumption difference *	insignificant
Average advertised fuel consumption for diesel engines	28.3 MPG 8.3 l/100km
Average real-world fuel consumption for diesel engines	27.5 MPG 8.5 l/100km
Average real diesel consumption difference *	insignificant

Audi A8 1999 specs

According to advertised fuel consumption, a Audi A8 1999 with automatic transmission consumes on average 0.8 liters per 100 km or 10% more fuel than similar versions with manual gearbox. Based on user-reported real-world fuel consumption, this generation Audi A8 with automatic transmission consumes around 0.3 litres per 100 km or 3% more fuel than a version with the same engine but a manual gearbox.

Compared to similar cars from other manufacturers, the Audi A8 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 2.8 petrol engine and manual transmission (Audi A8 1999 2.8 5V Quattro 193 HP 4x4). However, of all modifications the best advertised fuel economy in its class has Audi A8 with 2.8 petrol engine and manual transmission (Audi A8 1999 2.8 5V 193 HP).

The table below shows the real and claimed fuel consumption and the differences for specific versions.

Modification	Claimed consumption	Real consumption
2.5 liter diesel engine
Audi A8 1999 2.5 TDI 150 Hp 150 HP manual	32.7 MPG 7.2 l/100km
Audi A8 1999 2.5 TDI 150 Hp Automatic 150 HP automatic	28.7 MPG 8.2 l/100km	28.3 MPG 8.3 l/100km+1%
Audi A8 1999 2.5 TDI Quattro 150 Hp Automatic 150 HP 4x4 automatic	26.4 MPG 8.9 l/100km	25.8 MPG 9.1 l/100km+2%
Audi A8 2001 2.5 TDI 180 Hp 180 HP manual	32.7 MPG 7.2 l/100km
Audi A8 2001 2.5 TDI 180 Hp Automatic 180 HP automatic	29.0 MPG 8.1 l/100km	29.0 MPG 8.1 l/100km0%
Audi A8 2001 2.5 TDI Quattro 180 Hp Automatic 180 HP 4x4 automatic	26.4 MPG 8.9 l/100km	26.4 MPG 8.9 l/100km0%
2.8 liter petrol engine
Audi A8 1999 2.8 5V 193 HP manual	23.8 MPG 9.9 l/100km	22.8 MPG 10.3 l/100km+4%
Audi A8 1999 2.8 5V Automatic 193 HP automatic	22.0 MPG 10.7 l/100km	22.2 MPG 10.6 l/100km-1%
Audi A8 1999 2.8 5V Quattro 193 HP 4x4 manual	21.2 MPG 11.1 l/100km	20.8 MPG 11.3 l/100km+2%
Audi A8 1999 2.8 5V Quattro Automatic 193 HP 4x4 automatic	20.1 MPG 11.7 l/100km	20.1 MPG 11.7 l/100km0%
3.3 liter diesel engine
Audi A8 2000 3.3 TDI Quattro 225 HP 4x4 automatic	24.2 MPG 9.7 l/100km	23.8 MPG 9.9 l/100km+2%
3.7 liter petrol engine
Audi A8 1999 3.7 260 HP automatic	20.5 MPG 11.5 l/100km	18.8 MPG 12.5 l/100km+9%
Audi A8 1999 3.7 Quattro 260 HP 4x4 automatic	19.1 MPG 12.3 l/100km	17.6 MPG 13.4 l/100km+9%
4.2 liter petrol engine
Audi A8 1999 4.2 Quattro 310 HP 4x4 automatic	18.2 MPG 12.9 l/100km	17.8 MPG 13.2 l/100km+2%
Audi A8 2000 4.2 Quattro Long 310 HP 4x4 automatic	18.1 MPG 13.0 l/100km	17.8 MPG 13.2 l/100km+2%
6.0 liter petrol engine
Audi A8 2001 6.0 Quattro 420 HP 4x4 automatic	16.1 MPG 14.6 l/100km
Audi A8 2001 6.0 Quattro Long 420 HP 4x4 automatic	16.1 MPG 14.6 l/100km

Do you own a Audi A8? Please share your fuel economy!

* - 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.