Audi RS6 C8 or BMW M3 / M4 G80 / G82? They're rivals, so owners often weigh one against the other. Here's how far each one goes, using the makers' and tuners' own figures from our two guides.
At a glance
| Audi RS6 C8 | BMW M3 / M4 G80 / G82 | |
|---|---|---|
| Years | 2020– | 2021– |
| Engine | 4.0 TFSI twin-turbo V8 (EA825) | 3.0 S58 twin-turbo inline-six |
| Stock power | 591 hp / 590 lb-ft (US) | 473 hp (Competition: 503 hp) |
Power by stage
| Audi RS6 C8 | BMW M3 / M4 G80 / G82 | |
|---|---|---|
| Stock | 591 hp | 503 hp |
| Stage 1 | 668–753 hp | ≈588–659 hp |
| Stage 2 | 720–819 hp | ≈604–669 hp |
| Stage 3 | 760–950+ hp | 750+ hp |
| Stage 4 | 1,000+ hp | 900+ hp |
Figures are the tuners' own claims from each guide, on the fuel each tuner states.
Typical parts cost
| Audi RS6 C8 | BMW M3 / M4 G80 / G82 | |
|---|---|---|
| Stage 1 | software $950–$2,599 (034, IE, APR, MTM), or $1,500 for 034's engine and gearbox bundle; Litchfield £1,800 including VAT. Unitronic sells through dealers only. | bootmod3 $595 (licence and one map). |
| Stage 2 | software $1,195 (CarBahn) or $3,049 (MTM); Litchfield with an exhaust £5,905–£9,782 before VAT. | the same bootmod3 licence ($595). |
| Stage 3 | IE software for Pure900 turbos $2,299; the turbos are extra. | — |
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 RS6 C8 reaches 1,000+ hp and the BMW M3 / M4 G80 / G82 900+ hp.