POSAIDON RS 830+ Mercedes AMG GT R Roadster

August 10, 2021 By Mike
Last updated on August 10, 2021

Open-air super sports car: AMG GT R Roadster with up to 880 hp

Mercedes presented the glorious culmination of the AMG GT model range last year with its Black Series version, whose four-liter, twin turbo V8 produces a whopping 730 PS and 800 Nm thanks to a number of enhancements. But anyone looking for not just copious power but also the joy of driving “topless” will be disappointed; the top model only comes as a coupé. Which means that the pinnacle of the roadster program is the AMG GT R, with a limited number of only 750 cars of the sof top variant. For POSAIDON, however, the 585 hp and 700 Nm of the most powerful roadster only served as the starting point for much higher power outputs.

The M178 engine in this model that has been enhanced by the specialists from Mülheim-Kärlich into the RS 830+ now packs 880 hp and a maximum torque (electronically limited) of 1,000 Nm, so that it clearly outpaces the Black Series. This huger increase in power has been achieved with two completely new, ball[1]bearing, high-performance turbochargers, forged high-performance pistons, a sports air filter, improved fuel pumps and high-performance spark plugs. The combustion gases that are produced leave the engine via new manifolds and downpipes with sports catalytic converters. In addition, the engine control software has of course been meticulously fine-tuned to the new hardware. It only takes the POSAIDON RS 830+ 2.9 seconds to sprint up to 100 km/h, and because the maximum speed limit has been lifted in the central powertrain control unit, the top speed is 360 km/h! AMG SPEEDSHIFT 7-speed dual-clutch transmission still takes care of the transmission of power and has also been enhanced and optimized on in terms of both its software and hardware.

Alongside the top tuning version that is described here, POSAIDON also offers two other, less aggressive hardware-based alternatives for the AMG GT R Roadster: the RS 830 in principle uses the same components as the RS 830+, but “only” has 830 hp and 950 Nm. Nevertheless, POSAIDON’s entry-level version, which upgrades the original turbocharger of the M178, adds downpipes with sports catalytic converters and an optimized air intake, already produces 780 hp and 850 Nm. This package also includes the reinforced transmission hardware.

Last but by no means least, POSAIDON rounds off its offer with a purely software optimization: in this case, the sports car from Affalterbach is upgraded to 670 hp and 800 Nm. By the way, these performance enhancements do not necessarily have to be based on the AMG GT R; POSAIDON can also offer them in this or a similar form for the less powerful GT, GT S and GT C works models. The removal of top speed limitation is available for all AMG and Mercedes models.

All other information is available from:
Fraunhofer-Str. 13
D-56218 Mülheim-Kärlich
Tel.: +49 (0)261 / 921 66 80 0
Email: info@posaidon.de