Ferrari is bringing an evolved Power Unit to Monza, but one of the most technically interesting elements of its ADUO-2 specification could be hidden inside the turbocharger. According to reports surrounding the upgrade, the Maranello engineers have revised the geometry and number of blades on the compressor impeller in an attempt to improve efficiency without significantly increasing the dimensions of the turbo.
The performance potential of Ferrari’s new Power Unit has naturally attracted attention ahead of the Italian Grand Prix, but the turbo development reveals a more subtle side of the project. Rather than introducing a completely new unit or adopting dimensions radically different from those used by rival manufacturers, Ferrari appears to have concentrated on the internal fluid dynamics of the compressor.
The approach fits into the broader Ferrari ADUO-2 development programme for Monza, where improving overall Power Unit efficiency is potentially just as important as chasing a headline increase in peak horsepower.
Ferrari evolves its turbo concept rather than replacing it
The information surrounding the revised turbocharger comes from reports in specialist media rather than an official Ferrari technical disclosure. Nevertheless, the reported changes are consistent with the development direction of the Scuderia’s 2026 Power Unit.
Ferrari is believed to have retained a turbocharger that is slightly more compact than those used by some rival manufacturers, while concentrating its development effort on the cold side of the system. This is the compressor responsible for increasing the pressure of the air before it enters the combustion process.
Simply increasing the diameter of the compressor impeller is not necessarily the most effective route to better performance. The way the component moves and compresses air depends on numerous geometric details, meaning relatively small modifications can significantly alter its efficiency.
Why the compressor impeller is central to Ferrari’s turbo upgrade
A turbocharger compressor is an extremely sophisticated fluid-dynamic machine. Its job is to increase the pressure of the incoming air before that air reaches the combustion chamber. As the air is compressed, its temperature inevitably rises as well, making compressor efficiency an important part of overall Power Unit development.
Several design parameters influence how efficiently that compression takes place, including:
- the geometry of the impeller;
- the number of blades;
- the angle of those blades;
- the internal fluid-dynamic profile;
- the efficiency of the airflow travelling through the compressor.
Every one of these factors affects the way energy is transferred from the rotating compressor wheel to the air. That is why seemingly tiny changes can have consequences far beyond their physical size.
This emphasis on efficiency also provides important context for Ferrari’s wider engine programme. The Monza specification has already been linked with a reported 15-horsepower performance increase, but the work inside the turbocharger suggests that peak output is only part of the development objective.
Small changes to the turbo blades can make a major difference
One of the most significant reported changes concerns the blade arrangement itself. Ferrari is believed to have modified both the number and shape of the compressor impeller blades.
Although such changes may appear minor, they can alter the fluid-dynamic behaviour of the compressor. A different blade configuration can potentially:
- improve compression efficiency;
- reduce certain aerodynamic losses inside the compressor;
- increase efficiency at high rotational speeds;
- optimise operation across different Power Unit conditions.
For a Formula 1 engine, any improvement in compressor efficiency can translate into performance without necessarily requiring a higher boost pressure. The objective is to use the system more effectively rather than simply forcing more air through it.
Ferrari is targeting efficiency, not just maximum horsepower
Power Unit upgrades are often reduced to a single question about how many additional horsepower they produce. Turbocharger development is more complex than that.
A more efficient compressor can improve the way the air is compressed and help the complete thermodynamic cycle operate more effectively. Potential benefits include a better engine response, smoother power delivery, greater overall Power Unit efficiency and improved energy management throughout the lap.
Those improvements can contribute to lap time even without a dramatic increase in maximum engine output. It is an important distinction when assessing why Ferrari’s Monza Power Unit upgrade is about more than horsepower.
The turbocharger therefore has to be considered as part of the complete hybrid system rather than as an isolated component. Improving one stage of the air-compression process can influence how effectively the combustion engine operates across different loads and operating conditions.
Why Ferrari does not simply increase the turbo diameter
There has been considerable discussion over the dimensions of Ferrari’s turbocharger compared with the solutions adopted by Mercedes and Red Bull Ford. However, the reported dimensional differences are relatively small rather than representing completely different turbo concepts.
In practical terms, the difference can amount to only a few millimetres. That makes the internal design of the impeller particularly important.
Revising blade geometry can potentially produce benefits equal to, or even greater than, those achieved by simply increasing compressor diameter. Turbocharger performance is determined by the interaction between fluid-dynamic efficiency and the demands of the combustion engine, not by the size of a single component in isolation.
This is why Formula 1 manufacturers invest heavily in details that are almost impossible to identify from outside the car. The overall diameter may remain similar, while substantial development takes place inside the compressor itself.
The hidden fluid dynamics inside Ferrari’s turbocharger
The turbocharger is one of the most complex elements of a modern Formula 1 Power Unit. Behind the design of the compressor wheel lies extensive fluid-dynamic development aimed at controlling how air behaves across an enormous range of rotational speeds and operating conditions.
Small geometric revisions can change the speed of the airflow, the distribution of pressure, the efficiency of the compression process and the behaviour of the compressor across different areas of its operating map.
These developments are almost invisible from the outside, but they can be fundamental to modern Formula 1 performance. Ferrari’s reported approach therefore focuses less on making the turbo visibly different and more on extracting additional efficiency from its existing architecture.
That philosophy is consistent with other details emerging from the Scuderia’s latest technical programme, including the additional performance gains being pursued alongside ADUO-2.
Turbo response and Power Unit delivery could also benefit
Another area potentially affected by the development is turbocharger response. Ferrari’s initial configuration had offered certain advantages during the start phase before regulatory changes were introduced to the starting procedure.
With the latest evolution, the aim could instead be to improve compressor behaviour throughout a broader range of Power Unit operation.
A more efficient compressor can help engineers manage power delivery more effectively across different engine loads. That does not mean completely eliminating turbo lag, but rather reducing inefficiencies within the fluid-dynamic system and making the turbocharger work more effectively across its operating range.
Why Monza is the ideal test for Ferrari’s new turbocharger
The evolved Power Unit makes its debut at a circuit that places exceptional demands on the engine. Monza features the highest proportion of full-power running over a lap, making the Italian Grand Prix an ideal test environment for Ferrari’s latest specification.
The Scuderia will be able to assess several important areas, including:
- whether the Power Unit can maintain strong speed towards the end of Monza’s long straights;
- whether compressor efficiency improves at high engine speeds;
- how effectively the hybrid deployment can be managed during prolonged periods of acceleration.
These factors should help reveal the true contribution of the turbocharger evolution under real track conditions. They will also provide another reference point for Ferrari’s position in the ongoing Power Unit development battle, which can be followed through our Ferrari technical analysis coverage.
Ferrari’s real development may be hidden inside the compressor
Discussion surrounding the Ferrari turbocharger has often focused on the diameter of the compressor impeller. The more significant development, however, could lie in its internal geometry.
Changing the number and shape of the blades means working directly on the compressor’s fluid-dynamic efficiency, improving the way air is accelerated and compressed before it reaches the combustion chamber. The approach is consistent with a Ferrari philosophy aimed at increasing the overall efficiency of the Power Unit rather than pursuing additional horsepower in isolation.
Monza will provide the first track assessment of the evolved specification. Yet the objective of this development may extend beyond the Italian Grand Prix and the remaining races of 2026. The technical knowledge gained from optimising the turbocharger could also become part of the foundation for future Ferrari Power Units, as Maranello continues to develop its engine architecture beyond the current season.
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