Matt Robinson profile picture Matt Robinson 5 months ago 3
Tuning

This 518bhp Mercedes-AMG A45 'RS' Will Do 201mph

The A45 RS 525 is one of two tuning packages available from Posaidon for AMG's mega hatch

Remind me later
This 518bhp Mercedes-AMG A45 'RS' Will Do 201mph - Tuning

A few weeks ago, RaceChip announced that it had unlocked nearly 500bhp from the already weapons-grade ‘M139’ engine in the Mercedes-AMG A45 S. Now, though, Posaidon has gone a step further.

Using a new engine map and an “upgraded turbocharger” (no further details are given for the new snail), the A45 ‘RS 525’ churns out a ridiculous 518bhp and 443lb ft, up from the stock figures of 416bhp and 369lb ft.

This 518bhp Mercedes-AMG A45 'RS' Will Do 201mph - Tuning

With the added thrust and deletion of the electronic top speed limiter, the RS 525 can hit 201mph and will dispatch 0-62mph in just 3.4 seconds. So, it’ll match a Porsche 911 Carrera 4S with Sport Chrono to 62mph, and edge it out by around 10mph at the top end.

This 518bhp Mercedes-AMG A45 'RS' Will Do 201mph - Tuning

Impressive, but perhaps a little excessive. If you agree, you might be more interested in the “lower-tier” option, which leaves the turbo alone and focuses on the software tweaks. The result is 469bhp and 413lb ft, making for a still extremely impressive 0-62mph time of 3.6 seconds and a top speed of 198mph. Both of these solutions will be available for the CLA 45 S in May.

If instead, you want more than 518bhp, Posaidon will soon have a ‘plus’ version, along with beefed-up brakes, a cat-back sports exhaust and carbon fibre ‘Evolution One’ rims.