The core engine for the 2015 Audi A4 in the United States is a 2.0-liter turbocharged inline-4 (2.0 TFSI) producing about 220 horsepower and 258 lb-ft of torque. Across markets, engine options varied, with Europe offering additional diesel and higher-performance variants and the S4 model using a larger 3.0-liter V6 in its lineup.
Engine options by market
Where you bought your A4 determined the exact engine lineup. Here are the common configurations for 2015.
United States and Canada
In North America, the primary engine was the 2.0L turbocharged inline-4 (2.0 TFSI), delivering roughly 220 hp and 258 lb-ft of torque. The transmission most often paired with this engine was an 8-speed automatic, with quattro all-wheel drive available on several trims. A six-speed manual transmission was occasionally offered on select configurations.
- 2.0L turbocharged inline-4 (2.0 TFSI) — about 220 hp / 258 lb-ft
- Transmission options: 8-speed automatic (Tiptronic) commonly used; manual on certain configurations
- Drivetrain: Front-wheel drive or quattro all-wheel drive depending on trim
Note: Diesel options were not widely offered in the U.S. A4 lineup in 2015, outside of specialty programs or imports.
Europe and other regions
In Europe and other markets, Audi offered a broader range, including diesel variants and, in some trims, larger petrol engines. Common configurations included:
- 2.0L TDI diesel — available in multiple tunes around 136–190 hp depending on market and emissions
- 2.0L TFSI petrol — similar displacement and turbocharging as the U.S. variant, around 220 hp
- 3.0L TFSI V6 — available in higher trims or sport-focused variants in some markets
Note: The 3.0L V6 TFSI is more closely associated with the higher-performance S4 lineup than with the base A4, though it appeared in certain market configurations.
S4 and performance variants
The performance-oriented S4 model in 2015 used a 3.0-liter V6 TFSI engine producing around 333 horsepower, paired with standard quattro all-wheel drive. This engine sits in the broader engine family shared with the A4/S4 lineup, but it is not the engine used in the standard A4 sedan baseline.
What this means for buyers
For buyers focusing on the 2015 A4 in the United States, the 2.0L TFSI is the defining powertrain, balancing performance with efficiency. In international markets, a broader array of engines—including diesel options and a 3.0L V6 in some trims—was available, with availability varying by country and model year.
Summary
The 2015 Audi A4's primary powertrain in the U.S. is the 2.0-liter turbocharged inline-4 (2.0 TFSI) delivering about 220 hp and 258 lb-ft of torque, with transmission and drivetrain choices varying by trim. Globally, Audi offered additional engines, including diesel options and, in some variants, a 3.0-liter TFSI V6 associated with higher-end models such as the S4.