Ferrari has unveiled new hardcore versions of its SF90 Stradale and SF90 Spider supercars, giving them the XX designation typically reserved for experimental track cars offered to loyal customers. These experimental cars, like the LaFerrari-based FXX K launched 10 years ago, serve as rolling laboratories for the development of future models, with feedback from owners playing a crucial role.
The SF90 XX Stradale and SF90 XX Spider have been designed to bring the extreme nature of the traditional XX cars to street-legal models. All 799 units of the coupe and 599 units of the convertible have already been sold out. Notable exterior features of the XX versions include new front fascias, vented fenders, unique light-strip taillights, and fixed rear wings – the first on a Ferrari road car since the F50 in the 1990s.
Under the hood, both models retain the regular SF90’s plug-in hybrid powertrain but with a slight increase in horsepower. The powertrain consists of a turbocharged 4.0-liter V-8 engine, an 8-speed dual-clutch automatic transmission, and three electric motors (two at the front and one at the rear). The combined power output has been boosted from 986 hp to 1,016 hp for these XX versions.
To achieve this power increase, Ferrari made several modifications to the V-8 engine. The intake and exhaust ducts have been polished, the compression ratio has been increased, new pistons have been installed, and the combustion chamber has been machined to improve airflow. Additionally, the tube from the intake plenum has been redesigned and repositioned closer to the bulkhead to enhance the cabin’s sound experience.
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The transmission’s software has also been tweaked for more dynamic acceleration, and a boost function from the electric side of the powertrain has been added. This function activates when the driver fully presses the accelerator pedal, resulting in impressive performance figures of 0-62 mph in 2.3 seconds and a top speed of 199 mph.
Chassis and aerodynamic upgrades have also been implemented to enhance performance on the track. The fixed rear wing, extended front splitter, front air ducts, active underbody elements, and new diffuser all contribute to generating substantial levels of downforce. Ferrari claims that these modifications generate approximately 1,170 pounds of downforce at 155 mph.
Engineers have not overlooked the handling capabilities of the XX versions. They focused on ensuring extreme performance without sacrificing driving enjoyment, even at the limit. With approximately 9% improvement in lateral acceleration, primarily due to increased downforce, and around 10% less body roll thanks to various chassis tweaks, these models offer a thrilling driving experience. The brake package has also been upgraded, with improved cooling for the front rotors and slightly larger rear rotors. The brake pads provide increased contact surface area, resulting in a higher coefficient of friction.
The SF90 XX Stradale and SF90 XX Spider are believed to be among the final iterations of the SF90 supercar range. Having been introduced in 2019, the SF90 Stradale’s successor is likely to arrive within the next 12-18 months, considering the typical five-year life cycle for a Ferrari model.
In conclusion, Ferrari has taken its already extreme SF90 Stradale and SF90 Spider supercars to a whole new level with the XX versions. These track-oriented models, while retaining the plug-in hybrid powertrain, have been enhanced in terms of performance, aerodynamics, and handling characteristics. With their unique design and limited availability, they represent the epitome of Ferrari’s pursuit of innovation and ultimate driving experiences.
