• F103 — Audi 60/75/80/Super 90 (1965–1972)
• B1 — Audi 80 (1972–1978)
• C1 — Audi 100 (1968–1976)
• C2 — Audi 100 (1976–1982)
• B2 — Audi 80/90 (1978–1986)
• C3 — Audi 100/200 (1982–1991)

A4 / 80 Line

• B3 — Audi 80 (1986–1991)
• B4 — Audi 80 (1991–1996)
• B5 — A4 (1994–2001)

A6 / 100 Line

• C4 — Audi 100/A6 (1991–1997)

Flagship

• D2 — A8 (1994–2002)

Coupe / Sports

• 8N — TT Mk1 (1998–2006)

A4 / S4 / RS4

• B6 — A4 (2000–2006)
• B7 — A4 (2004–2008)

A6

• C5 — A6 (1997–2004)
• C6 — A6 (2004–2011)

A8

• D3 — A8 (2002–2010)

TT

• 8J — TT Mk2 (2006–2014)

SUVs

• 8L — A3 (1996–2003)
• 8P — A3 (2003–2013)
• 8R — Q5 (2008–2017)
• 4L — Q7 (2005–2015)

A3

• 8V — A3 (2012–2020)

A4 / A5

• B8 — A4 (2008–2016)
• B8.5 — Facelift (2012–2016)
• 8T — A5 (2007–2016)

A6 / A7

• C7 — A6 (2011–2018)
• C7.5 — Facelift (2014–2018)
• 4G — A7 (2010–2018)

A8

• D4 — A8 (2010–2017)

TT

• 8S — TT Mk3 (2014–2023)

SUVs

• 8U — Q3 (2011–2018)
• FY — Q5 (2017–2024)
• 4M — Q7 (2015–present)

A3 / S3 / RS3

• 8Y — A3 (2020–present)

A4 / A5

• B9 — A4 (2015–2023)
• B9.5 — Facelift (2019–2023)
• F5 — A5 (2016–present)

A6 / A7

• C8 — A6 (2018–present)
• 4K — A7 (2018–present)

A8

• D5 — A8 (2017–present)

SUVs

• F3 — Q3 (2018–present)
• FY (continued) — Q5
• 4M (continued) — Q7
• 4N — Q8 (2018–present)

AUDI ELECTRIC

• GE — e-tron SUV (2019–present)
• GY — e-tron GT (2021–present)
• Q4 e-tron — (2021–present)
• PPE Platform (upcoming EVs)

The Icons

• B5 RS4 — (2000–2001)
• B7 RS4 — (2006–2008)
• B8 RS5 — (2010–2015)
• C6 RS6 — (2008–2010)
• C7 RS6 — (2013–2018)
• C8 RS6 — (2020–present)
• 8V RS3 — (2015–2020)
• 8Y RS3 — (2022–present)
• R8 (42 / 4S) — (2007–present)

Notes

Audi is different from BMW/Mercedes:

• B = A4 platform
• C = A6 platform
• D = A8 platform
• Numbers like 8V, 4G, etc. = internal chassis codes
• Facelifts use .5 (B8 → B8.5)