The Audi A4 lineup uses a range of engines, with the most common current setup being a 2.0-liter turbocharged inline-4 (TFSI) with mild-hybrid tech; other options include diesel variants in Europe, a plug-in hybrid in several markets, and higher-performance V6 powertrains for S4/RS4. Availability varies by market and model year.
In this article, we break down the typical engine options offered across the A4 lineup today, note regional differences, and explain how to identify which engine your particular car has. The goal is to map the powertrains to the models you’re likely to encounter on showroom floors or roads today.
Current engine options by powertrain type
Below is a broad overview of the main engine families you’ll find on modern A4 models. Availability is market-specific and can change with model-year updates or regional offerings.
Gasoline (TFSI) engines
- 2.0-liter turbocharged inline-4 TFSI with 12V mild-hybrid assist. This is the mainstream A4 engine, offered in various tunes and typically producing from around 190 hp up to about 260 hp in higher-spec variants.
- 3.0-liter V6 TFSI, used in performance-oriented A4 variants such as the S4, delivering significantly more power (generally in the mid-to-upper 300s horsepower in markets like the United States).
Gasoline TFSI engines form the core of most A4 trims, balancing efficiency with performance across everyday driving and brisk acceleration.
Diesel (TDI) engines
- 2.0-liter TDI four-cylinder – a common European option that provides good efficiency with modest power output, typically around 140–190 hp depending on the version.
- 3.0-liter TDI V6 – a larger-dislacement option for higher torque and sustained highway performance, usually offering around 258–286 hp depending on the market.
Diesel options are more prevalent in Europe and other markets; they are less common or unavailable in many North American configurations.
Electrified powertrains
- A4 TFSIe (plug-in hybrid) variants in markets where offered, combining the 2.0-liter TFSI engine with an electric motor for higher combined output and an electric-only range. Availability and figures vary by country and model year.
Plug-in hybrids provide a bridge between conventional gasoline efficiency and electric driving, with performance and range that depend on the local market and test cycle.
High-performance and RS variants
- Audi S4 variants use the 3.0-liter V6 TFSI with notably enhanced performance and standard all-wheel drive in most markets.
- RS4, where offered, uses a 2.9-liter twin-turbo V6 with substantially higher output for the most demanding performance applications; availability is region-specific and limited.
Performance-focused A4 models expand the range with more powerful engines, but they represent a distinct tier within the A4 family with unique tuning and drivetrains.
How to identify the exact engine in your A4
Because engine availability shifts by generation, market and trim, the best way to confirm your specific A4’s powertrain is to check the vehicle identification number (VIN) details, the window sticker, or Audi’s official build sheet for your car. If you’re shopping used, the engine code listed on the engine bay label or VIN decode will tell you precisely which powertrain you have.
Summary
The Audi A4’s engine lineup spans gasoline four-cylinders (TFSI) as the standard choice, optional diesel (TDI) in European markets, electrified plug-in hybrids in certain regions, and higher-performance V6 powertrains for S4 and RS4 variants. Market availability and exact horsepower figures vary by model year and country, so always verify the specific engine on the vehicle’s documentation or VIN.