The POSAIDON A 45 RS 525

April 29, 2020 By Mike
Last updated on April 29, 2020

POSAIDON A 45 RS 525 (based on Mercedes-AMG W177 A 45 / A 45 S 4MATIC+)

High-speed hot hatch: POSAIDON A 45 RS 525 hits 324 km/h.

By launching the A 45 and A 45 S – AMG siblings in the latest A-Class generation (W177) – Mercedes-Benz put two red-hot irons in the compact-class fire. The ex-works models boast 387 hp (A 45) and 421 hp (A 45 S) 2.0l engines with twin-scroll turbochargers, AMG SPEEDSHIFT DCT 8-speed dual-clutch transmission, plus 4MATIC+ all-wheel drive, turning these “little” AMGs into high-speed missiles. All the same, the engineers at POSAIDON saw the need to boost the A 45’s performance even further. And, unlike their competitors – many of whom have only hinted at making such modifications – POSAIDAN have already launched a two-tier upgrade for the two A-Class siblings. What’s more, there are further projects in the pipeline!

In keeping with standard POSAIDON nomenclature, the workshop’s most powerful interpretation of the A 45s (to date) will go by the name A 45 RS 525. The name details the performance boost achieved by POSAIDON: By installing a more efficient, upgraded turbocharger and optimizing the engine map, the POSAIDON engineers have unlocked a hefty 525 hp in the M139 engine along with maximum torque of 600 Nm. Thanks to further optimizations to the control units for the AMG SPEEDSHIFT transmission and the drive chain (CPC), the A 45 converts this added power into a catapult launch, going from 0-100 km/h in just 3.4 seconds and topping out at 324 km/h. By way of comparison, these figures mean the hot hatch is as fast as the legendary Ferrari F40.

POSAIDON’s lower-tier upgrade is only tamer by a whisker; leaving out the turbocharger upgrading and focusing exclusively on the software optimizations detailed above, it generates 465 hp plus 560 Nm of torque. This upgrade tier achieves a top speed of 318 km/h and 0-100 km/h in 3.6 seconds. Preparations for TÜV assessments are underway for both power levels. What’s more, as we alluded to earlier, an even more powerful “plus” model is currently in the development phase – though POSAIDON is giving nothing away at present about its potential performance. This summer, POSAIDON is also set to launch a host of extras for the AMG A 45 and A 45 S, including a high-performance braking system, cat back sports exhausts, turbochargers and – of course – its in-house, full-carbon Evolution One rims. Perfectly dimensioned at 8.5×20″, these weigh in at just 4.9 kilograms each.

Incidentally, the POSAIDON power upgrades detailed here are also “suitable” for sister models of the A 45/A 45 S, namely the 45 models in the CLA series C118 (Coupé, fourdoor) and X118 (Shooting Brake) as well as H247 series compact SUVs, the GLA 45 and GLA 45 S. These all feature identical drive systems and are set to hit the market in May. All other facts, as well as price and delivery information, can be obtained directly from:

Fraunhofer-Straße 13 56218 Mülheim-Kärlich, Germany
Tel.: +49 (0) 261 921 66 80 0 or +49 (0) 800-POSAIDON*