The first-generation Audi A4 (B5) was produced from 1994 to 2001 and was available in saloon, estate, and cabriolet body styles.
The B5 generation of the A4 was initially offered with a range of inline-four and V6 engines, producing between 90 and 170 horsepower.
In 1997, Audi introduced the S4 variant, which featured a 2.7-liter twin-turbocharged V6 engine producing 250 horsepower.
The second-generation A4 (B6) was produced from 2001 to 2005 and saw significant styling updates, as well as improved interior features.
The B6 A4 was available with a range of inline-four and V6 engines, including a 2.0-liter turbocharged unit producing up to 255 horsepower in the S4 variant.
The third-generation A4 (B7) produced from 2005 to 2008 featured revised styling and improved safety features, such as side airbags and anti-lock braking systems.
In 2006, Audi introduced a facelifted version of the B7 A4, featuring updated exterior styling and interior trim changes.
The fourth-generation A4 (B8) produced from 2008 to 2015 saw significant platform updates, as well as improvements in comfort and technology features.
The B8 A4 was available with a range of inline-four and V6 engines, including a 3.0-liter supercharged unit producing up to 335 horsepower in the S4 variant.
In 2011, Audi introduced a facelifted version of the B8 A4, featuring updated exterior styling, new safety features, and improved infotainment systems.
The fifth-generation A4 (B9) produced from 2015 to 2022 featured revised styling and improved technology features, including a range of driver assistance systems.
The B9 A4 was available with a range of inline-four and V6 engines, including a 3.0-liter turbocharged unit producing up to 349 horsepower in the S4 variant.
In 2017, Audi introduced a facelifted version of the B9 A4, featuring updated exterior styling, new safety features, and improved infotainment systems.
The sixth-generation A4 (B10) produced from 2022 onwards has seen significant updates to comfort and technology features, including improved driver assistance systems and enhanced interior design.
The B10 A4 is available with a range of inline-four and V6 engines, including a 3.0-liter turbocharged unit producing up to 349 horsepower in the S4 variant.
The Audi A4 has been produced in right-hand drive form for the UK market since its introduction in 1994.
In some markets, the A4 is sold as the "Audi 100" or "Audi 200", particularly when equipped with larger engines.
The A4 has won several awards throughout its production run, including European Car of the Year and World Car of the Year titles.
The Audi S4 variant of the A4 was used as a development mule for the Volkswagen Group's Quattro GmbH company to test and develop new technology features.
The B8 A4 was one of the first mass-produced vehicles to feature a 12-inch touchscreen infotainment system.
In some markets, Audi has offered special edition variants of the A4, such as the "Audi S Line" and "Audi Sport Edition" models.
The A4 has been produced with a range of body styles, including saloon, estate, cabriolet, and even a 5-door hatchback variant in some markets.
The Audi A4 is one of the best-selling compact executive cars of all time, with over 6 million units sold worldwide.
In 2020, Audi announced that it would be ending production of the A4 at its German factory in Neckarsulm.
The B10 A4 has seen updates to its powertrain lineup, including a new 3-cylinder turbocharged unit producing up to 150 horsepower.