Audi A6 (diesel) • 1,005 cars with Valuation

Market overview: Diesel Audi A6 (June-2026): There are currently 1,005 used diesel Audi A6 cars for sale. Prices range from £5,195 to £47,590, with a median price of £15,995. AutoUncle has identified 231 cars as being offered below market price. The typical selling time for a diesel Audi A6 is approximately 26 days, and 46.8% of the listings have recently been reduced in price (Source: AutoUncle market data, June-2026).

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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 S-Line 204 HP (150 kW) 2021 Sedan

(2021) Audi A6 S-Line 204 HP

Good price

You save £1,405

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

Carwow

Used Audi A6 S-Line 190 HP (139 kW) 2018 Sedan

(2018) Audi A6 S-Line 190 HP

Good price

You save £1,701

CW7 Cheshire West And Chester, Cheshire

131 g CO2/km comb. - 190 HP (139 kW) - 5.0 Mpg

Carwow

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

(2021) Audi A6 Sport 204 HP

Good price

You save £1,210

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

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-1%

1 / 3

Used (2023) Audi A6 S-Line 204 HP | Super price

- Avant 40 TDI Quattro S Line 5dr

2023
56,562 miles
Trim level: S-Line
2.0L Diesel
Estate
Automatic
204 HP (150 kW)
CO2 emissions: 152 g CO2/km comb.
5.8 mpg
Details

Super price

£25,249

£25,691

LE12 7AT Mountsorrel, Leicestershire

Availability verified

-3%

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

£17,999

£18,699

CW7 Cheshire West And Chester, Cheshire

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1 / 4

Used (2017) Audi A6 Advanced 190 HP | Good price

- 2.0 TDI Ultra SE Executive 4dr S

2017
91,940 miles
Trim level: Advanced
2.0L Diesel
Sedan
Automatic
190 HP (139 kW)
CO2 emissions: 114 g CO2/km comb.
4.4 mpg
Details

Good price

£9,699

PE134AX, Cambridgeshire

Availability verified

-9%

1 / 3

Used (2018) Audi A6 190 HP | Super price

Avant (2018/18)SE Executive 2.0

2018
62,442 miles
2.0L Diesel
Estate
Manual
190 HP (139 kW)
CO2 emissions: 118 g CO2/km comb.
4.5 mpg
Details

Super price

£12,561

£13,834

RM13 8RH Greater London, London

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Used Audi A6 S-Line 190 HP (139 kW) 2018 Estate

(2018) Audi A6 S-Line 190 HP

Good price

You save £1,505

118 g CO2/km comb. - 190 HP (139 kW) - 4.5 Mpg

Carwow

Used Audi A6 S-Line 190 HP (139 kW) 2017 Black Sedan

(2017) Audi A6 S-Line 190 HP

Fair price

RM13 8RH Greater London, London

131 g CO2/km comb. - 190 HP (139 kW) - 5.0 Mpg

Carwow

Used Audi A6 Sport 204 HP (150 kW) 2020 Grey Estate

(2020) Audi A6 Sport 204 HP

Super price

You save £4,005

CO92SX Halstead, Essex

151 g CO2/km comb. - 204 HP (150 kW) - 47.1 Mpg

Carwow

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

(2018) Audi A6 Black Edition 272 HP

Fair price

144 g CO2/km comb. - 272 HP (200 kW) - 5.4 Mpg

-2%

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Used (2021) Audi A6 Sport 286 HP | Super price

50 TDI Quattro Sport 4dr Tip

2021
49,070 miles
Trim level: Sport
3.0L Diesel
Sedan
Automatic
286 HP (210 kW)
CO2 emissions: 178 g CO2/km comb.
50.4 mpg
Details

Super price

£20,999

£21,599

CW7 Cheshire West And Chester, Cheshire

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Used (2021) Audi A6 S-Line 286 HP | Super price

- 50 TDI Quattro S Line 4dr Tip

2021
88,601 miles
Trim level: S-Line
3.0L Diesel
Sedan
Automatic
286 HP (210 kW)
CO2 emissions: 179 g CO2/km comb.
6.8 mpg
Details

Super price

£17,290

MK22BA

Availability verified

-6%

1 / 4

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

40 TDI Quattro Sport 5dr S

2020
108,286 miles
Trim level: Sport
2.0L Diesel
Estate
Automatic
204 HP (150 kW)
CO2 emissions: 151 g CO2/km comb.
47.1 mpg
Details

Super price

£13,595

£14,495

CO92SX Halstead, Essex

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New

1 / 3

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

£18,199

CW7 Cheshire West And Chester, Cheshire

Availability verified

-1%

1 / 4

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

- 40 TDI Quattro Sport 4dr S

2021
98,897 miles
Trim level: Sport
2.0L Diesel
Sedan
Automatic
204 HP (150 kW)
CO2 emissions: 147 g CO2/km comb.
5.6 mpg
Details

Super price

£14,995

£15,295

LU3 3AN Luton, Bedfordshire

Availability verified

-6%

1 / 3

Used (2021) Audi A6 S-Line 286 HP | Super price

- 50 TDI Quattro S Line 4dr Tip

2021
91,670 miles
Trim level: S-Line
3.0L Diesel
Sedan
Automatic
286 HP (210 kW)
CO2 emissions: 179 g CO2/km comb.
6.8 mpg
Details

Super price

£16,878

£18,040

E65LU

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

(2021) Audi A6 S-Line 204 HP

Fair price

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

Super price

You save £2,664

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 £2,005

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

Carwow

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

(2021) Audi A6 S-Line 286 HP

Super price

You save £4,622

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

-5%

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

- 40 TDI Sport 4dr S Tronic

2021
75,256 miles
Trim level: Sport
2.0L Diesel
Sedan
Automatic
204 HP (150 kW)
CO2 emissions: 142 g CO2/km comb.
5.4 mpg
Details

Super price

£14,636

£15,567

E65LU

Availability verified

-2%

1 / 3

Used (2018) Audi A6 S-Line 190 HP | Good price

- 2.0 TDI Quattro S Line 4dr

2018
63,410 miles
Trim level: S-Line
2.0L Diesel
Sedan
Automatic
190 HP (139 kW)
CO2 emissions: 131 g CO2/km comb.
5 mpg
Details

Good price

£12,699

£12,999

CW7 Cheshire West And Chester, Cheshire

Availability verified

1 / 4

Used (2014) Audi A6 S-Line 190 HP | Super price

- 2.0 TDI Ultra S Line 4dr

2014
137,059 miles
Trim level: S-Line
2.0L Diesel
Sedan
Manual
190 HP (139 kW)
CO2 emissions: 117 g CO2/km comb.
4.5 mpg
Details

Super price

£4,500

LU79LG

Availability verified

1 / 4

Used (2018) Audi A6 Black Edition 272 HP | Super price

- Avant 3.0 TDI [272] Quattro

2018
104,201 miles
Trim level: Black Edition
3.0L Diesel
Estate
Automatic
272 HP (200 kW)
CO2 emissions: 144 g CO2/km comb.
5.4 mpg
Details

Super price

£12,995

HP23 4NB Marsworth, Buckinghamshire

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1 / 4

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

- 40 TDI S Line 4dr Tronic

2021
71,395 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

£16,295

RG263JE

Availability verified

-6%

1 / 4

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

40 TDI Quattro Sport 4dr S Tronic

2023
50,808 miles
Trim level: Sport
2.0L Diesel
Sedan
Automatic
204 HP (150 kW)
CO2 emissions: 147 g CO2/km comb.
5.6 mpg
Details

Super price

£23,420

£24,920

BB1 3NU Lancashire, Lancashire

Availability verified

-1%

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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

£16,495

£16,795

LU33AN

Availability verified

1 / 4

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

- Avant 2.0 TDI Ultra Black

2018
99,412 miles
Trim level: Black Edition
2.0L Diesel
Estate
Automatic
190 HP (139 kW)
CO2 emissions: 122 g CO2/km comb.
4.7 mpg
Details

Good price

£11,449

MK404LN

Availability verified

1 / 3

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

- 40 TDI Sport 4dr S Tronic

2021
90,226 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

£13,795

LU33AN

Availability verified

1 / 4

Used (2015) Audi A6 190 HP | Good price

- Avant 2.0 TDI Ultra SE 5dr S

2015
115,750 miles
2.0L Diesel
Estate
Automatic
190 HP (139 kW)
CO2 emissions: 114 g CO2/km comb.
4.4 mpg
Details

Good price

£7,490

S9 3NH South Yorkshire, South Yorkshire

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

(2018) Audi A6 Black Edition 190 HP

Good price

You save £1,351

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

Carwow

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

(2021) Audi A6 Sport 204 HP

Good price

You save £1,401

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

Carwow

Used Audi A6 190 HP (139 kW) 2018 Grey Estate

(2018) Audi A6 190 HP

Super price

You save £2,339

RM13 8RH Greater London, London

118 g CO2/km comb. - 190 HP (139 kW) - 4.5 Mpg

Carwow

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

(2021) Audi A6 Sport 204 HP

Fair price

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

-4%

1 / 2

Used (2018) Audi A6 S-Line 190 HP | Super price

- 2.0 TDI Ultra S Line 4dr

2018
75,750 miles
Trim level: S-Line
2.0L Diesel
Sedan
Automatic
190 HP (139 kW)
CO2 emissions: 114 g CO2/km comb.
4.4 mpg
Details

Super price

£10,494

£10,994

OL84PQ

Availability verified

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

- 40 TDI Sport 4dr S Tronic

2021
68,767 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

£15,879

E65LU

Availability verified

1 / 4

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

- 40 TDI Sport 4dr S Tronic

2021
74,067 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

£15,999

MK22BA

Availability verified

-4%

1 / 2

Used (2018) Audi A6 S-Line 190 HP | Super price

- 2.0 TDI Ultra S Line 4dr

2018
87,300 miles
Trim level: S-Line
2.0L Diesel
Sedan
Automatic
190 HP (139 kW)
CO2 emissions: 114 g CO2/km comb.
4.4 mpg
Details

Super price

£9,994

£10,494

OL84PQ

Availability verified

1 / 4

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

- 40 TDI Sport 4dr S Tronic

2021
90,432 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

£14,490

MK22BA

Availability verified

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

(2018) Audi A6 Black Edition 272 HP

Super price

You save £3,305

HP23 4NB Marsworth, Buckinghamshire

144 g CO2/km comb. - 272 HP (200 kW) - 5.4 Mpg

Carwow

Used Audi A6 S-Line 272 HP (200 kW) 2018 Sedan

(2018) Audi A6 S-Line 272 HP

Super price

You save £3,505

133 g CO2/km comb. - 272 HP (200 kW) - 5.1 Mpg

Carwow

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

(2021) Audi A6 Sport 204 HP

Super price

You save £3,005

LU3 3AN Luton, Bedfordshire

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

Carwow

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

(2021) Audi A6 S-Line 204 HP

Fair price

S80 2QD Nottinghamshire, Nottinghamshire

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

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Audi A6 (1000+)