If fuel cost matters most
Audi A4 with up to 37 MPG combined.
Side-by-side verified model comparison
Audi A6 vs Audi A4
Audi A6 and Audi A4 answer the same shopping question from different directions. The A4 is more efficient on verified EPA data, while the A4 reaches the higher power peak. Use the table below to decide whether your priority is fuel cost, safety, size or outright output.
At a glance
| Metric | Audi A6 | Audi A4 |
|---|---|---|
| Production coverage | 1994 - present | 1994 - present |
| Verified generations | 2 | 2 |
| Peak power | 340 hp | 354 hp |
| Best EPA combined | 33 MPG | 37 MPG |
| Latest NHTSA overall | 5★ | 5★ |
| Open recalls (2018/2024) | 2 | 0 |
| Latest dimensions | 4939 × 1886 × 1457 mm | 4726 × 1842 × 1427 mm |
| Average curb weight | 1837 kg (4050 lbs) | 1605 kg (3538 lbs) |
| Fuel types | Petrol, Diesel | Petrol |
If power matters most
Audi A4 with a verified peak of 354 hp.
If safety is the filter
They are effectively tied on this metric; use the table and generation links for context.
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Head-to-Head: Base Model Specifications
A detailed side-by-side comparison of the entry-level powertrain for the newest verified generation of each model. This shows exactly what you get before adding options or stepping up to premium trims.
| Specification | Audi A6A6 C8 45 TFSI 2.0 | Audi A4A4 B9 40 TFSI 2.0 |
|---|---|---|
| Engine & Performance | ||
| Engine Type | Petrol | Petrol |
| Cylinders / Configuration | I4 | I4 |
| Displacement | 2.0L (1984 cc) | 2.0L (1984 cc) |
| Aspiration | Turbocharged | Turbocharged |
| Horsepower | 245 hp | 190 hp |
| Torque | 370 Nm | 320 Nm |
| 0-100 km/h (0-62 mph) | 6.8 s | 7.3 s |
| Top Speed | 250 km/h | 210 km/h |
| Transmission & Drivetrain | ||
| Transmission | Dual-clutch | Dual-clutch |
| Gears | 7 | 7 |
| Drivetrain | AWD | FWD |
| Fuel Economy & Range | ||
| City MPG (EPA) | 26.0 MPG | 32.0 MPG |
| Highway MPG (EPA) | 34.0 MPG | 43.0 MPG |
| Combined MPG (EPA) | 30.0 MPG | 37.0 MPG |
| Electric Range | — | — |
| Battery Capacity | — | — |
| CO₂ Emissions | 162 g/km | 139 g/km |
| Dimensions & Utility | ||
| Length | 4939 mm | 4726 mm |
| Width | 1886 mm | 1842 mm |
| Height | 1457 mm | 1427 mm |
| Wheelbase | 2924 mm | 2820 mm |
| Curb Weight | 1745 kg | 1490 kg |
| Doors / Seats | 4 / 5 | 4 / 5 |
What search winners do that generic comparisons don’t
The top-ranking comparison pages win because they answer an explicit buying job: which one is more efficient, which one is safer, which one is larger, which one has the broader powertrain range. Pages that only dump two brochures side by side rarely hold clicks.
This comparison uses the newest verified generation of each model as the headline lens, then routes you into the exact generation sheets for the trim-level details. That is more durable than comparing incentives or dealer inventory, and more trustworthy than hiding missing data behind a made-up score.
Questions buyers ask
Which is more fuel-efficient, the A6 or the A4?
Audi A4 wins on verified EPA combined economy at up to 37 MPG, versus 33 MPG for the Audi A6.
Which has more horsepower, the A6 or the A4?
Audi A4 reaches the higher verified peak at 354 hp, compared with 340 hp for the Audi A6.
Which is safer: A6 or A4?
Audi A6 has a latest recorded NHTSA overall rating of 5★; Audi A4 has 5★. Cross-check the frontal, side and rollover rows rather than using one headline number alone.
Is this a trim-by-trim comparison?
This page compares the newest verified generation of each model family. For year-specific engines, dimensions and trim tables, open the linked generation pages for each side.