BMW M340i G20 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
| BMW M340i G20 | BMW M3 / M4 G80 / G82 | |
|---|---|---|
| Years | 2019– | 2021– |
| Engine | 3.0 turbo inline-six B58 | 3.0 S58 twin-turbo inline-six |
| Stock power | 374 PS / 500 Nm | 473 hp (Competition: 503 hp) |
Power by stage
| BMW M340i G20 | BMW M3 / M4 G80 / G82 | |
|---|---|---|
| Stock | 374 PS | 503 hp |
| Stage 1 | 400–460 PS / hp | ≈588–659 hp |
| Stage 2 | 460–500 hp | ≈604–669 hp |
| Stage 3 | 510–650 PS / hp | 750+ hp |
| Stage 4 | 700–800+ whp | 900+ hp |
Careful: one car's figures are at the wheels (whp) and the other's at the engine (hp), so they aren't directly comparable. Convert with the crank to wheel calculator.
Typical parts cost
| BMW M340i G20 | BMW M3 / M4 G80 / G82 | |
|---|---|---|
| Stage 1 | bootmod3 $595 plus a bench unlock ($215 mail-in, or $850–$1,500 FEMTO on 06/2020+ cars); BR-Performance €890; G-Power €1,995 fitted; plug-in boxes $599 (JB4) or €609 (RaceChip); xHP gearbox software from $299.99. | bootmod3 $595 (licence and one map). |
| Stage 2 | downpipe $479.99 (VRSF) to $1,424.99 (Active Autowerke); heat exchanger $699 (CSF) or $749.99 (Mishimoto); Eventuri intake $1,495; AWE exhaust from $1,755. | the same bootmod3 licence ($595). |
| Stage 3 | — | — |
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 BMW M340i G20 reaches 700–800+ whp and the BMW M3 / M4 G80 / G82 900+ hp.