The Audi A5 isn’t defined by a single engine type; it has been offered with both inline-4 and V6 powertrains across its generations.
In practice, that means early or base A5 models typically used a 2.0-liter turbocharged inline-4, higher trims and generations deployed 3.0-liter V6 engines, and diesel variants (2.0 TDI and 3.0 TDI) appeared in European markets. The high-performance RS5 uses a twin-turbo V6, and the exact setup depends on the model year, trim level, and region.
Engine options across generations
Gasoline engines
Gasoline engine layouts in the A5 lineup have included both inline-4 and V6 configurations over the years.
- Inline-4 petrol: 2.0 TFSI turbocharged engine (common in most recent A5 variants).
- V6 petrol: 3.0 TFSI (used in S5 and other higher trims).
- Older 3.2 FSI V6: a historically used gasoline V6 in early A5 models.
Across generations, these gasoline engines illustrate Audi’s approach to balancing efficiency and performance in the A5 family.
Diesel engines
In markets where diesel options were offered, the A5 included inline-4 and V6 diesel configurations.
- Inline-4 diesel: 2.0 TDI (available in several markets).
- V6 diesel: 3.0 TDI (common in Europe, often in higher trims).
Diesel variants have been particularly popular in European regions for long-range driving and strong torque at low RPMs.
High-performance variants
For buyers seeking peak performance, the A5 lineup includes stronger V6 options and a flagship RS model with a twin-turbo V6.
- S5: 3.0 TFSI V6 gasoline engine, delivering higher output than the base A5.
- RS5: 2.9 TFSI twin-turbo V6 gasoline engine, delivering top-tier performance in the A5 family.
These variants illustrate how the A5 range scales from efficient daily drivers to high-performance machines.
Summary
The Audi A5 spans multiple engine configurations. Today’s base A5 models typically use a 2.0-liter inline-4, while performance-oriented versions (S5 and RS5) rely on V6 powertrains, including the RS5’s twin-turbo 2.9-liter V6. Diesel options exist in several markets with 2.0 TDI or 3.0 TDI V6, and older generations also included a 3.2 V6. In short, the A5 is not a single V4 or V6; it offers both configurations across its history, depending on year, trim, and market.