Mercedes-AMG C63 W205 or Mercedes-AMG A45 S? Both are Mercedes-AMG cars, with very different engines. Here's how far each one goes, using the makers' and tuners' own figures from our two guides.
At a glance
| Mercedes-AMG C63 W205 | Mercedes-AMG A45 S | |
|---|---|---|
| Years | 2015–2021 (coupé and cabriolet later) | 2019– (facelift 2023) |
| Engine | 4.0 twin-turbo V8 M177 | 2.0 turbo four M139 |
| Stock power | 476 PS (C63) / 510 PS (C63 S) | 421 PS / 500 Nm (EU) |
Power by stage
| Mercedes-AMG C63 W205 | Mercedes-AMG A45 S | |
|---|---|---|
| Stock | 476–510 PS | 421 hp |
| Stage 1 | 550–611 hp | 450–510 hp |
| Stage 2 | 590–667 hp | 470–520 hp |
| Stage 3 | 700–820 hp | 525–600 hp |
| Stage 4 | 830–950 hp | 600–650+ hp |
Figures are the tuners' own claims from each guide, on the fuel each tuner states.
Typical parts cost
| Mercedes-AMG C63 W205 | Mercedes-AMG A45 S | |
|---|---|---|
| Stage 1 | remaps €990 (BR-Performance), £720–£1,440 (Litchfield) or $1,999–$3,280 (Weistec, RENNtech); CPC upgrade for 2019-on cars $1,699 (Weistec); plug-in modules $767 (RaceChip) or €3,799 (DTE). | $1,499–$2,580 (Eurocharged, Weistec, RENNtech); gearbox tune $1,000 more; RaceChip €609; EST with a new CPC £1,550 including VAT. |
| Stage 2 | downpipes $3,079 (Weistec) or £2,180.34–£5,746.14 (Milltek, track-only or with sports cats); CSF heat exchanger $749; Weistec airboxes $1,499; RENNtech R1 package $6,880. | Weistec downpipe $899 or Milltek £990; water-methanol kit $1,600; EST Stage 2 £2,150–£3,750. |
| Stage 3 | turbos €2,940.33 before VAT (TTE760+), $2,995 send-in (Pure900) or $5,499 (Weistec W.3); RENNtech turbo packages $13,840–$23,880; fuel pumps $4,280 (RENNtech). | hybrid turbos $2,999 (Weistec) or €1,470–€4,499 before VAT (TTE, MACHGRADE); EST570 £6,995–£8,550. |
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 Mercedes-AMG C63 W205 reaches 830–950 hp and the Mercedes-AMG A45 S 600–650+ hp.