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Audi A6 (diesel) • 1,047 cars with Valuation

Market overview: Diesel Audi A6 (August-2026): There are currently 1,047 used diesel Audi A6 cars for sale. Prices range from £4,728 to £45,890, with a median price of £15,994. AutoUncle has identified 206 cars as being offered below market price. The typical selling time for a diesel Audi A6 is approximately 29 days, and 48.9% of the listings have recently been reduced in price (Source: AutoUncle market data, August-2026).

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Used Audi A6 Sport 204 HP (150 kW) 2018 Black Estate

(2018) Audi A6 Sport 204 HP

Fair price

N11 1GN Greater London, London

148 g CO2/km comb. - 204 HP (150 kW) - 5.6 Mpg

Carwow

Used Audi A6 S-Line 204 HP (150 kW) 2021 Sedan

(2021) Audi A6 S-Line 204 HP

Good price

You save £1,701

CW7 Cheshire West And Chester, Cheshire

142 g CO2/km comb. - 204 HP (150 kW) - 5.4 Mpg

Carwow

Used Audi A6 Sport 204 HP (150 kW) 2021 Sedan

(2021) Audi A6 Sport 204 HP

Good price

You save £1,905

142 g CO2/km comb. - 204 HP (150 kW) - 5.4 Mpg

Carwow

Used Audi A6 Black Edition 190 HP (139 kW) 2018 Estate

(2018) Audi A6 Black Edition 190 HP

Fair price

KA8 9RT Heathfield, Ayrshire And Arran

122 g CO2/km comb. - 190 HP (139 kW) - 4.7 Mpg

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-6%

1 / 4

Used (2019) Audi A6 S-Line 204 HP | Super price

DIESEL SALOON 40 TDI S Line 4dr S

2019
53,390 miles
Trim level: S-Line
2.0L Diesel
Sedan
Automatic
204 HP (150 kW)
CO2 emissions: 142 g CO2/km comb.
62.8 mpg
Details

Super price

£17,099

£18,199

CW73AL Cheshire West And Chester, Cheshire

Availability verified

-3%

1 / 4

Used (2019) Audi A6 Sport 204 HP | Super price

Avant 2019 | 2.0 TDI 40 Sport S

2019
57,134 miles
Trim level: Sport
2.0L Diesel
Estate
Automatic
204 HP (150 kW)
CO2 emissions: 148 g CO2/km comb.
5.6 mpg
Details

Super price

£16,680

£17,300

WS11 8LX Great Wyrley, Staffordshire

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-1%

1 / 4

Used (2019) Audi A6 Sport 204 HP | Super price

40 TDI Sport 5dr S Tronic

2019
53,963 miles
Trim level: Sport
2.0L Diesel
Estate
Automatic
204 HP (150 kW)
CO2 emissions: 148 g CO2/km comb.
5.6 mpg
Details

Super price

£16,680

£17,000

NR3 2AW Norfolk, Norfolk

Availability verified

-1%

1 / 4

Used (2021) Audi A6 Sport 204 HP | Super price

Avant 2021 Sport 40 TDI 5dr S

2021
113,614 miles
Trim level: Sport
2.0L Diesel
Estate
Automatic
204 HP (150 kW)
CO2 emissions: 148 g CO2/km comb.
5.6 mpg
Details

Super price

£12,295

£12,495

B330SJ

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Used Audi A6 S-Line 204 HP (150 kW) 2019 Grey Estate

(2019) Audi A6 S-Line 204 HP

Good price

You save £1,305

LU3 3AN Luton, Bedfordshire

149 g CO2/km comb. - 204 HP (150 kW) - 46.3 Mpg

Carwow

Used Audi A6 Black Edition 272 HP (200 kW) 2016 Black Estate

(2016) Audi A6 Black Edition 272 HP

Fair price

Estimated price £16,189

S81 7BQ Nottinghamshire, Nottinghamshire

143 g CO2/km comb. - 272 HP (200 kW) - 52.0 Mpg

Carwow

Used Audi A6 S-Line 204 HP (150 kW) 2021 Estate

(2021) Audi A6 S-Line 204 HP

Fair price

149 g CO2/km comb. - 204 HP (150 kW) - 5.7 Mpg

Carwow

Used Audi A6 S-Line 204 HP (150 kW) 2021 Sedan

(2021) Audi A6 S-Line 204 HP

Good price

You save £1,286

142 g CO2/km comb. - 204 HP (150 kW) - 5.4 Mpg

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Used (2021) Audi A6 Sport 204 HP | Good price

- 40 TDI Sport 4dr S Tronic

2021
63,487 miles
Trim level: Sport
2.0L Diesel
Sedan
Automatic
204 HP (150 kW)
CO2 emissions: 142 g CO2/km comb.
5.4 mpg
Details

Good price

£15,995

£16,795

LU33AN

Availability verified

-3%

1 / 3

Used (2021) Audi A6 S-Line 204 HP | Good price

- Avant 40 TDI S Line 5dr

2021
67,081 miles
Trim level: S-Line
2.0L Diesel
Estate
Automatic
204 HP (150 kW)
CO2 emissions: 149 g CO2/km comb.
5.7 mpg
Details

Good price

£17,695

£18,295

LU33AN

Availability verified

-10%

1 / 4

Used (2021) Audi A6 Sport 204 HP | Super price

Avant (2022/72)Sport (Technology

2021
34,009 miles
Trim level: Sport
2.0L Diesel
Estate
Automatic
204 HP (150 kW)
CO2 emissions: 151 g CO2/km comb.
5.7 mpg
Details

Super price

£23,699

£26,599

NR31 0HB Norfolk, Norfolk

Availability verified

-1%

1 / 4

Used (2019) Audi A6 Sport 204 HP | Super price

2.0 TDI 40 Sport S Tronic Euro 6

2019
113,614 miles
Trim level: Sport
2.0L Diesel
Estate
Automatic
204 HP (150 kW)
CO2 emissions: 148 g CO2/km comb.
48.7 mpg
Details

Super price

£12,295

£12,495

B33 0SJ West Midlands, West Midlands

Availability verified

-3%

1 / 4

Used (2019) Audi A6 S-Line 204 HP | Super price

40 TDI S Line 5dr S Tronic

2019
67,081 miles
Trim level: S-Line
2.0L Diesel
Estate
Automatic
204 HP (150 kW)
CO2 emissions: 149 g CO2/km comb.
46.3 mpg
Details

Super price

£17,695

£18,295

LU3 3AN Luton, Bedfordshire

Availability verified

-2%

1 / 4

Used (2019) Audi A6 S-Line 204 HP | Good price

Avant 2.0 TDI 40 S line Estate 5dr

2019
85,266 miles
Trim level: S-Line
2.0L Diesel
Estate
Automatic
204 HP (150 kW)
CO2 emissions: 149 g CO2/km comb.
46.3 mpg
Details

Good price

£16,995

£17,495

LU3 3AN Luton, Bedfordshire

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Used Audi A6 Black Edition 272 HP (200 kW) 2018 Sedan

(2018) Audi A6 Black Edition 272 HP

Good price

You save £1,905

138 g CO2/km comb. - 272 HP (200 kW) - 5.2 Mpg

Carwow

Used Audi A6 S-Line 204 HP (150 kW) 2021 Sedan

(2021) Audi A6 S-Line 204 HP

Good price

You save £1,601

CW7 Cheshire West And Chester, Cheshire

142 g CO2/km comb. - 204 HP (150 kW) - 5.4 Mpg

Carwow

Used Audi A6 Black Edition 190 HP (139 kW) 2017 White Estate

(2017) Audi A6 Black Edition 190 HP

Fair price

Estimated price £14,584

OL9 6HT Greater Manchester, Manchester

122 g CO2/km comb. - 190 HP (139 kW) - 4.7 Mpg

Carwow

Used Audi A6 S-Line 204 HP (150 kW) 2021 Estate

(2021) Audi A6 S-Line 204 HP

Fair price

149 g CO2/km comb. - 204 HP (150 kW) - 5.7 Mpg

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Used (2020) Audi A6 Sport 204 HP | Super price

40 TDI Sport 4dr S Tronic

2020
63,487 miles
Trim level: Sport
2.0L Diesel
Sedan
Automatic
204 HP (150 kW)
CO2 emissions: 142 g CO2/km comb.
50.4 mpg
Details

Super price

£15,995

£23,495

LU3 3AN Luton, Bedfordshire

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1 / 4

Used (2022) Audi A6 Sport 204 HP | Super price

Avant 2022 Sport 40 TDI Quattro S

2022
34,006 miles
Trim level: Sport
2.0L Diesel
Estate
Automatic
204 HP (150 kW)
CO2 emissions: 151 g CO2/km comb.
5.8 mpg
Details

Super price

£23,699

£23,799

NR31 0HB Norfolk, Norfolk

Availability verified

-3%

1 / 4

Used (2023) Audi A6 Sport 204 HP | Good price

40 TDI Quattro Sport 4dr S Tronic

2023
36,498 miles
Trim level: Sport
2.0L Diesel
Sedan
Automatic
204 HP (150 kW)
CO2 emissions: 147 g CO2/km comb.
5.6 mpg
Details

Good price

£24,240

£25,039

SO31 7FL Lower Swanwick, Hampshire

Availability verified

1 / 4

Used (2021) Audi A6 Sport 204 HP | Super price

Avant 2021 Sport 40 TDI 5dr S

2021
57,134 miles
Trim level: Sport
2.0L Diesel
Estate
Automatic
204 HP (150 kW)
CO2 emissions: 148 g CO2/km comb.
5.6 mpg
Details

Super price

£17,030

£17,010

WS111SL

Availability verified

-5%

1 / 4

Used (2021) Audi A6 S-Line 204 HP | Good price

- 40 TDI S Line 4dr Tronic

2021
40,960 miles
Trim level: S-Line
2.0L Diesel
Sedan
Automatic
204 HP (150 kW)
CO2 emissions: 142 g CO2/km comb.
5.4 mpg
Details

Good price

£18,599

£19,699

CW7 Cheshire West And Chester, Cheshire

Availability verified

-3%

1 / 4

Used (2019) Audi A6 S-Line 204 HP | Good price

DIESEL SALOON 40 TDI S Line 4dr S

2019
40,960 miles
Trim level: S-Line
2.0L Diesel
Sedan
Automatic
204 HP (150 kW)
CO2 emissions: 142 g CO2/km comb.
62.8 mpg
Details

Good price

£18,599

£19,199

CW73AL Cheshire West And Chester, Cheshire

Availability verified

-4%

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Used (2021) Audi A6 S-Line 204 HP | Good price

2021 S Line 40 TDI 4dr Tronic

2021
44,287 miles
Trim level: S-Line
2.0L Diesel
Sedan
Automatic
204 HP (150 kW)
CO2 emissions: 142 g CO2/km comb.
5.4 mpg
Details

Good price

£18,614

£19,531

E65LU

Availability verified

-3%

1 / 4

Used (2021) Audi A6 S-Line 204 HP | Super price

2021 S Line 40 TDI 4dr Tronic

2021
41,240 miles
Trim level: S-Line
2.0L Diesel
Sedan
Automatic
204 HP (150 kW)
CO2 emissions: 142 g CO2/km comb.
5.4 mpg
Details

Super price

£16,599

£17,249

DH3 2BQ Birtley, Durham

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1 / 4

Used (2019) Audi A6 S-Line 204 HP | Good price

40 TDI S Line 4dr S Tronic

2019
44,287 miles
Trim level: S-Line
2.0L Diesel
Sedan
Automatic
204 HP (150 kW)
CO2 emissions: 142 g CO2/km comb.
5.4 mpg
Details

Good price

£18,614

E6 5LT Greater London, London

Availability verified

-3%

1 / 4

Used (2024) Audi A6 Sport 204 HP | Good price

Avant 2024 | 2.0 TDI 40 Sport S

2024
8,747 miles
Trim level: Sport
2.0L Diesel
Estate
Automatic
204 HP (150 kW)
CO2 emissions: 152 g CO2/km comb.
5.6 mpg
Details

Good price

£30,000

£31,000

S60 5BD Sheffield, South Yorkshire

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Used Audi A6 S-Line 286 HP (210 kW) 2021 Sedan

(2021) Audi A6 S-Line 286 HP

Super price

You save £3,874

179 g CO2/km comb. - 286 HP (210 kW) - 6.8 Mpg

Carwow

Used Audi A6 S-Line 204 HP (150 kW) 2021 Estate

(2021) Audi A6 S-Line 204 HP

Fair price

149 g CO2/km comb. - 204 HP (150 kW) - 5.7 Mpg

Carwow

Used Audi A6 S-Line 204 HP (150 kW) 2021 Sedan

(2021) Audi A6 S-Line 204 HP

Fair price

You save £1,100

WD3 3RT Croxley Green, Hertfordshire

142 g CO2/km comb. - 204 HP (150 kW) - 5.4 Mpg

Carwow

Used Audi A6 Sport 204 HP (150 kW) 2021 Estate

(2021) Audi A6 Sport 204 HP

Super price

You save £2,950

N11 1GN Greater London, London

148 g CO2/km comb. - 204 HP (150 kW) - 5.6 Mpg

New

1 / 4

Used (2019) Audi A6 S-Line 204 HP | Good price

Avant S Line 40 TDI 204PS S Tronic

2019
81,659 miles
Trim level: S-Line
2.0L Diesel
Estate
Automatic
204 HP (150 kW)
CO2 emissions: 149 g CO2/km comb.
46.3 mpg
Details

Good price

£17,155

E6 5LT Greater London, London

Availability verified

-5%

1 / 4

Used (2021) Audi A6 S-Line 204 HP | Good price

- 40 TDI S Line 4dr Tronic

2021
53,390 miles
Trim level: S-Line
2.0L Diesel
Sedan
Automatic
204 HP (150 kW)
CO2 emissions: 142 g CO2/km comb.
5.4 mpg
Details

Good price

£17,199

£18,199

CW7 Cheshire West And Chester, Cheshire

Availability verified

New

1 / 4

Used (2016) Audi A6 Performance 190 HP | Good price

Avant 2.0 TDI Ultra SE (11/14-) 5d

2016
75,000 miles
Trim level: Performance
2.0L Diesel
Estate
Automatic
190 HP (139 kW)
CO2 emissions: 114 g CO2/km comb.
64 mpg
Details

Good price

£9,995

MK44 3HW Great Barford, Bedfordshire

Availability verified

-8%

1 / 3

Used (2021) Audi A6 S-Line 204 HP | Good price

- 40 TDI S Line 4dr Tronic

2021
54,230 miles
Trim level: S-Line
2.0L Diesel
Sedan
Automatic
204 HP (150 kW)
CO2 emissions: 142 g CO2/km comb.
5.4 mpg
Details

Good price

£17,199

£18,699

CW7 Cheshire West And Chester, Cheshire

Availability verified

1 / 4

Used (2018) Audi A6 Black Edition 190 HP | Super price

2018 Black Edition 2.0 TDI Ultra

2018
115,853 miles
Trim level: Black Edition
2.0L Diesel
Sedan
Automatic
190 HP (139 kW)
CO2 emissions: 118 g CO2/km comb.
4.5 mpg
Details

Super price

£8,949

MK404LN

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Used Audi A6 S-Line 204 HP (150 kW) 2019 Black Estate

(2019) Audi A6 S-Line 204 HP

Good price

You save £1,645

E6 5LT Greater London, London

149 g CO2/km comb. - 204 HP (150 kW) - 46.3 Mpg

Carwow

Used Audi A6 S-Line 204 HP (150 kW) 2020 Blue Sedan

(2020) Audi A6 S-Line 204 HP

Fair price

Estimated price £17,418

WD3 3RT Croxley Green, Hertfordshire

147 g CO2/km comb. - 204 HP (150 kW) - 5.6 Mpg

Carwow

Used Audi A6 S-Line 204 HP (150 kW) 2019 Blue Estate

(2019) Audi A6 S-Line 204 HP

Fair price

You save £1,105

DE73 7HL Stenson, Derbyshire

149 g CO2/km comb. - 204 HP (150 kW) - 46.3 Mpg

Carwow

Used Audi A6 S-Line 204 HP (150 kW) 2019 Black Sedan

(2019) Audi A6 S-Line 204 HP

Good price

You save £2,301

CW73AL Cheshire West And Chester, Cheshire

142 g CO2/km comb. - 204 HP (150 kW) - 62.8 Mpg

Showing 1 - 25 of 1,067 results

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Audi A6 (1000+)