Real-world fuel economy

Audi A6 MPG: what owners actually get

Owners report 40.8 mpg from a Audi A6, about 83% of the official figure. On its NEDC-tested engines that is 81%, about typical: the median NEDC-tested car in this 8,216-engine dataset returns 82%. The tables below give the figure for every engine and generation we hold. Add your own at the bottom and the averages get better for the next buyer.

40.8mpg

Real-world average, all engines

83%

of the official combined figure

18–62

Range reported by owners (mpg)

1,966

Owner submissions

Free advert check

Found an Audi A6 for sale?

Paste the advert and we read it against the Audi A6’s known faults, its MOT history and the DVLA record, with the real-world 40.8 mpg from this page in the running-cost line, and tell you what the seller has not. Free, about a minute, no card.

Check an Audi A6 advert (free) →

Works with any listing: paste the text from AutoTrader, Gumtree, eBay, Facebook Marketplace or a dealer’s own site.

Audi A6

2004–2011 · real average 39.5 mpg · owners report 23.0–58.0 mpg · 268 submissions

Engine	Official (NEDC)	Official (WLTP)	Real MPG	% of official	Owners report
2.0 FSI	35.8	–	36.1	101%	35.4–37.0
2.0 TDI	46.3–49.6	–	44.5	93%	33.4–55.0
2.0 TDI multitronic	48.7	–	39.9	82%	30.0–48.8
2.0 TDIe	53.3	–	46.3	87%	40.0–57.6
2.0 TDIe multitronic	48.7	–	41.9	86%	38.9–45.0
2.0 TFSI	37.7	–	32.9	87%	27.0–37.1
2.0 TFSI multitronic	36.7	–	31.9	87%	27.0–36.7
2.4	29.1	–	26.3	90%	22.5–30.0
2.7 TDI	40.9–45.6	–	40.9	95%	32.0–49.0
2.7 TDI multitronic	44.1	–	37.2	84%	30.0–44.0
2.7 TDI quattro	39.8	–	31.0	78%	29.0–34.0
2.8 FSI	32.5–33.6	–	–	–	–
2.8 FSI quattro	31.4	–	–	–	–
3.0 TDI quattro	35.3–42.2	–	33.4	86%	28.0–42.0
3.0 TDI quattro tiptronic	39.8	–	35.0	88%	30.0–40.5
3.0 TFSI quattro	30.1	–	26.3	87%	23.0–28.9
3.2 FSI	28.2–29.1	–	–	–	–
3.2 FSI quattro	26.4	–	26.6	101%	25.5–30.0
4.2 FSI quattro	23.9–26.2	–	–	–	–

Audi A6 Avant

2005–2011 · real average 38.3 mpg · owners report 22.0–56.0 mpg · 355 submissions

Engine	Official (NEDC)	Official (WLTP)	Real MPG	% of official	Owners report
2.0 FSI	34.9	–	29.3	84%	27.0–31.7
2.0 TDI	45.6–48.7	–	41.8	89%	32.0–52.0
2.0 TDI multitronic	47.9	–	37.7	79%	28.8–44.1
2.0 TDIe multitronic	47.9	–	37.9	79%	32.4–40.6
2.0 TFSI multitronic	36.2	–	31.2	86%	27.0–35.3
2.0T FSI	37.7	–	28.9	77%	26.0–33.0
2.4	28.8	–	27.0	94%	24.0–30.2
2.4 quattro	25.9	–	–	–	–
2.7 TDI	39.8–45.6	–	40.0	94%	32.0–49.0
2.7 TDI multitronic	43.5	–	37.2	85%	28.0–44.0
2.7 TDI quattro	39.8	–	32.6	82%	27.0–42.0
2.8 FSI	32.1–33.2	–	–	–	–
2.8 FSI quattro	31.0	–	–	–	–
3.0 TDI quattro	34.9–42.2	–	37.1	96%	–
3.0 TDI quattro tiptronic	39.8	–	34.2	86%	26.0–42.0
3.0 TFSI quattro	29.7	–	25.5	86%	25.0–26.0
3.2 FSI	25.7	–	–	–	–
3.2 FSI quattro	26.2	–	23.9	91%	21.7–26.0
4.2 FSI	24.1	–	–	–	–
4.2 FSI quattro	23.9–25.9	–	25.5	102%	22.0–29.0

Audi A6 Allroad

2006–2012 · real average 34.3 mpg · owners report 27.0–42.0 mpg · 71 submissions

Engine	Official (NEDC)	Official (WLTP)	Real MPG	% of official	Owners report
2.7 TDI quattro	37.7	–	35.4	94%	31.5–42.0
3.0 TDI quattro	39.2	–	38.6	99%	36.0–40.0
3.0 TDI quattro tiptronic	37.7	–	33.6	89%	26.8–38.5

Audi A6

2011–2018 · real average 42.6 mpg · owners report 18.0–58.0 mpg · 510 submissions

Engine	Official (NEDC)	Official (WLTP)	Real MPG	% of official	Owners report
1.8 TFSI 190 S tronic	47.9–50.4	–	32.3	66%	–
2.0 TDI	57.6	–	44.1	77%	–
2.0 TDI 190 quattro S tronic	56.5–57.6	–	38.4	67%	–
2.0 TDI 190 Ultra	65.7	–	48.6	74%	–
2.0 TDI 190 Ultra S tronic	67.3	–	47.1	70%	–
2.0 TDI multitronic	56.5	–	41.3	73%	–
2.0 TDI Ultra	62.8–65.7	–	46.7	73%	–
2.0 TDI Ultra S tronic	64.2–67.3	–	45.9	70%	–
2.0 TFSI 252 quattro S tronic	40.9–42.2	–	23.5	57%	–
2.0 TFSI Hybrid	45.6	–	33.3	73%	–
3.0 BiTDI 320 quattro Tiptronic	45.6–47.1	–	32.3	70%	–
3.0 BiTDI quattro	44.8	–	35.1	78%	–
3.0 TDI 204	53.3	–	46.0	86%	–
3.0 TDI 204 multitronic	55.4	–	42.1	76%	–
3.0 TDI 204 quattro S tronic	49.6	–	39.5	80%	–
3.0 TDI 218 quattro S tronic	55.4–57.6	–	41.6	74%	–
3.0 TDI 218 S tronic	60.1–64.2	–	42.0	68%	–
3.0 TDI 245 quattro	47.9	–	41.0	86%	–
3.0 TDI 272 quattro S tronic	54.3–55.4	–	37.2	68%	–
3.0 TFSI quattro	34.4	–	19.2	56%	–

Audi A6 Avant

2011–2018 · real average 41.6 mpg · owners report 22.0–58.0 mpg · 556 submissions

Engine	Official (NEDC)	Official (WLTP)	Real MPG	% of official	Owners report
1.8 TFSI 190 S tronic	47.1–49.6	–	33.7	70%	28.0–41.5
2.0 TDI	56.5	–	42.6	75%	32.0–52.0
2.0 TDI 190 quattro	62.8	–	47.3	75%	36.0–56.0
2.0 TDI 190 quattro S tronic	54.3–64.2	–	37.2	63%	30.7–45.0
2.0 TDI multitronic	55.4	–	39.6	72%	31.6–48.0
2.0 TDI Ultra	60.1–62.8	–	48.4	79%	37.0–58.0
2.0 TDI Ultra S tronic	61.4–64.2	–	45.7	73%	35.0–56.6
2.0 TFSI 252 quattro S tronic	39.8–40.9	–	27.2	67%	22.0–30.9
3.0 BITDI 320 quattro Tiptronic	44.1–45.6	–	33.1	74%	28.0–37.4
3.0 BiTDI quattro	44.8	–	36.0	80%	31.0–42.0
3.0 TDI 204	53.3	–	42.9	80%	33.0–52.0
3.0 TDI 204 multitronic	54.3	–	44.2	81%	38.8–54.7
3.0 TDI 204 quattro S tronic	48.7	–	39.8	82%	39.0–40.5
3.0 TDI 218 S tronic	58.9–62.8	–	44.9	74%	39.8–50.0
3.0 TDI 245 quattro	47.9	–	38.6	81%	30.0–49.0
3.0 TDI 272 quattro S tronic	52.3–53.3	–	37.5	71%	32.0–45.8
3.0 TDI quattro 245	47.9	–	37.0	77%	30.0–44.5
3.0 TFSI quattro	34.4	–	24.7	72%	22.3–28.0

Audi A6 Allroad

2012–2018 · real average 38.9 mpg · owners report 30.0–48.0 mpg · 107 submissions

Engine	Official (NEDC)	Official (WLTP)	Real MPG	% of official	Owners report
3.0 BiTDI 313 quattro	42.2	–	37.1	88%	30.0–46.0
3.0 BiTDI 320 quattro	43.5	–	37.5	86%	33.0–42.0
3.0 TDI 204 quattro	46.3	–	40.8	88%	–
3.0 TDI 218 quattro	49.6	–	39.4	79%	34.0–42.0
3.0 TDI 218 S tronic	49.6	–	40.9	83%	–
3.0 TDI 272 quattro	50.4	–	38.4	76%	–
3.0 TFSI quattro	31.7	–	–	–	–

Audi A6

2018–2025 · real average 44.4 mpg · owners report 23.0–58.0 mpg · 44 submissions

Engine	Official (NEDC)	Official (WLTP)	Real MPG	% of official	Owners report
3.0 TDI 344 quattro tiptronic	–	38.2–40.4	–	–	–
3.0 TDI 349 quattro tiptronic	–	39.2–40.4	–	–	–
40 TDI quattro S tronic	60.1–64.2	45.6–47.9	44.5	95%*	–
40 TDI S tronic	60.1–62.8	48.7–52.3	48.3	96%*	38.0–58.0
40 TFSI MHEV S tronic	–	37.7–39.2	33.5	87%*	–
45 TFSI MHEV S tronic	–	35.3–37.2	–	–	–
45 TFSI quattro S tronic	41.5–42.8	33.6–35.3	26.0	75%*	25.0–28.0
50 TDI quattro S tronic	49.6	39.2	–	–	–
50 TDI quattro tiptronic	49.6–50.4	38.7–41.5	–	–	–
50 TFSIe 299 14.1kWh	–	217.3–256.8	–	–	–
50 TFSIe 299 17.9kWh	–	217.3–256.8	–	–	–
50 TFSIe 367 14.1kWh	–	217.3	–	–	–
55 TFSI quattro S tronic	38.2–39.2	30.1–31.4	–	–	–
S6 TDI	44.8–45.6	36.2	–	–	–

Audi A6 Avant

2018–2025 · real average 47.5 mpg · owners report 32.0–62.0 mpg · 55 submissions

Engine	Official (NEDC)	Official (WLTP)	Real MPG	% of official	Owners report
40 TDI quattro S tronic	60.1–62.8	44.8–46.3	47.4	104%*	45.0–52.0
40 TDI S tronic	57.6–60.1	44.8–50.4	50.3	106%*	39.0–59.0
40 TFSI MHEV S tronic	–	36.2–38.2	–	–	–
45 TFSI MHEV S tronic	–	34.0–36.2	–	–	–
45 TFSI quattro S tronic	40.9–42.2	33.2–34.4	35.3	105%*	32.0–41.0
45 TFSI S tronic	40.9	33.2	–	–	–
50 TDI quattro	48.7	40.4	43.7	108%*	–
50 TDI quattro tiptronic	48.7	39.2	–	–	–
50 TDI quatttro tiptronic	48.7	38.7	55.9	144%*	52.0–62.0
50 TFSIe 299 14.1kWh	–	201.8–217.3	–	–	–
50 TFSIe 299 17.9kWh	–	201.8–217.3	–	–	–
55 TFSI quattro S tronic	37.2–38.2	30.1–30.7	–	–	–
55 TFSI S tronic	37.2	30.1	–	–	–
55 TFSIe 367 14.1kWh	–	188.3–201.8	–	–	–
S6	43.5	35.3–35.8	–	–	–

Audi A6 Allroad

2019–2021 · no real-world average yet

Engine	Official (NEDC)	Official (WLTP)	Real MPG	% of official	Owners report
45 TDI MHEV	–	40.4–42.2	–	–	–
50 TDI	48.7	37.2–37.7	–	–	–
55 TFSI	–	31.7–33.2	–	–	–

All figures in miles per gallon (UK). “Owners report” is the spread of individual submissions for that engine. * Measured against the WLTP figure rather than NEDC.

Add your Audi A6 Real MPG

What does yours actually do? Read it off the trip computer over a full tank or work it out from litres and miles. No postcode, no sign-up. The more people add, the better the averages get, and this page stays free.

Audi A6 fuel economy questions

What is the real-world MPG of a Audi A6?

Owners report an average of 40.8 mpg across all Audi A6 engines with data, about 83% of the official combined figure. The engine tables on this page give the figure for each engine and generation.

Why is the Audi A6 real MPG lower than the official figure?

Official figures come from a laboratory test cycle, not the road. Cold starts, short trips, hills, load, tyres and driving style all cost fuel the test does not see. A gap of 10 to 30 per cent is normal; a much bigger gap on one engine usually points at a fault, a heavy right foot, or a diesel that never gets warm.

Where did the Honest John Audi A6 Real MPG page go?

The site closed in August 2026 and its Real MPG section went with it. This page is where the Audi A6 figures now live: rebuilt from the archived dataset, with the official figures kept alongside, and reopened for new submissions.

Looking at an Audi A6 right now? Check the advert before you go and see it.

Where the Audi A6 figures come from

If you used the Honest John Real MPG section before the site closed in 2026, this is where the Audi A6 figures now live. The owner-reported averages above were rebuilt from the archived dataset (archived page, 2026-08) alongside the official NEDC and WLTP figures and new submissions from CarAdCheck readers, and the section is open so they keep improving. Real-world figures also feed the running-cost estimate in our free advert check.

CarAdCheck is not affiliated with Honest John or Volkswagen Financial Services. How we rebuilt Real MPG.

Other Audi models

Audi A146.7 mpg Audi A346.2 mpg Audi A441.8 mpg Audi A537.1 mpg

Before you go and see it

Fuel economy is one line on the Audi A6 running-cost sheet. These guides cover the checks that stop you buying the wrong one.

How to haggle for a used car: negotiate the price with what its records show13 min read HPI check vs carVertical: which is better, and our pick for a UK car9 min read MOT advisories explained: how to check them, and which ones should worry you12 min read

All buyer's guides →