Audi RS5 B9 or Audi S4 B9? They share a platform, with different power. Here's how far each one goes, using the makers' and tuners' own figures from our two guides.
At a glance
| Audi RS5 B9 | Audi S4 B9 | |
|---|---|---|
| Years | 2018–2024 (facelift 2019) | 2017–2024 (Europe: petrol until 2019) |
| Engine | 2.9 TFSI EA839 twin-turbo V6 | 3.0 TFSI EA839 turbo V6 |
| Stock power | 450 PS / 600 Nm (US 444 hp) | 354 PS / 500 Nm (US 349 hp) |
Power by stage
| Audi RS5 B9 | Audi S4 B9 | |
|---|---|---|
| Stock | 450 PS | 354 PS |
| Stage 1 | 500–525 hp | 430–450 hp |
| Stage 2 | 525–605 hp | 445–470 hp |
| Stage 3 | 590–680 hp | 530–620 hp |
| Stage 4 | 710–740 hp | 630–740 hp |
Figures are the tuners' own claims from each guide, on the fuel each tuner states.
Typical parts cost
| Audi RS5 B9 | Audi S4 B9 | |
|---|---|---|
| Stage 1 | APR Stage 1 $899.95, or $1,799.95 as APR Plus with a limited powertrain warranty. | APR Stage 1 $1,299.99, or $2,299.99 as APR Plus with a limited powertrain warranty. |
| Stage 2 | APR high-pressure fuel pump (2.9T and 3.0T) $1,499.95. | APR Power Pack (tune, Ultralink, intake with turbo inlet) $1,599.95; Unitronic downpipe $2,634.99 (Black Forest Industries). |
| Stage 3 | — | APR DTR8868 turbo with Stage 3 software $3,099.95 (ORT Motorsport), £3,128.44 in the UK (AwesomeGTI). |
List prices from the guides, before shipping, import tax and fitting. "—" means that guide has no cost line for the stage.
Where each one ends up
At Stage 4 the Audi RS5 B9 reaches 710–740 hp and the Audi S4 B9 630–740 hp.
Read the full guides
- The Audi RS5 B9 guide
- The Audi S4 B9 guide
- Compare other cars in the compare tool
- All comparisons