The First Road-Legal XX Model, the Ferrari SF90 XX, is Unveiled

Ferrari SF90 XX Stradale | Ferrari SF90 XX Stradale

Ferrari SF90 XX Spider | Ferrari SF90 XX Spider

A Rare Model for Enjoyment on Both Track and Street

Ferrari has unveiled the new limited-production special series "SF90 XX Stradale" and "SF90 XX Spider," based on the "SF90 Stradale." These are the first XX models to be road-legal, with the "SF90 XX Stradale" limited to 799 units and the "SF90 XX Spider" to 599 units.

Text by YANAKA Tomomi

The Highest Performance in Ferrari's Road Car History

For 20 years, XX models have been developed to offer track driving enjoyment to a select group of professional customer drivers, in parallel with the development of benchmark models within the Prancing Horse lineup such as the "488 Pista" and "812 Competizione."

The First Road-Legal XX Model, the Ferrari "SF90 XX," is Unveiled | Ferrari

Based on the experience gained in these two fields, Ferrari decided to create a model that could deliver track performance on the road by maximizing the engineering concepts of both programs. This led to the development of the XX models, which are PHEV versions derived from the SF90.

The power unit of the "SF90 XX" series, born from this endeavor, combines a 4.0-liter V8 engine with three electric motors, similar to the SF90. Two motors are mounted independently on the front axle, one for each side, and the remaining motor is positioned between the rear engine and the gearbox.

This configuration results in a maximum system output of 1030 cv (757 kW), a 30 cv increase over the SF90 Stradale. This figure reportedly sets a new performance benchmark for Ferrari's entire lineup.

A lithium-ion battery with a capacity of 7.9 kWh powers the electric motors, enabling a range of 25 km in the fully electric "eDrive mode."

In addition to "eDrive mode," there are four driving modes in total, including "Qualifying mode" and "Performance mode," which utilize the newly adopted extra boost function to deliver maximum system performance. The top speed is 320 km/h, with 0-100 km/h acceleration in 2.3 seconds.

While the transmission inherits the 8-speed dual-clutch first introduced in the "SF90 Stradale," the shift logic has been significantly revised. The patented logic introduced in the "Daytona SP3" has been adopted, contributing to dynamic acceleration characteristics.

Furthermore, the "SF90 XX Stradale" boasts the most efficient aerodynamic performance of any Ferrari road car to date, generating a maximum downforce of 315 kg at 250 km/h, which is double the maximum value of the "SF90 Stradale." Contributing to this is the fixed rear wing, a key exterior feature of the SF90 XX series.

Incidentally, this is the first time a fixed wing has been incorporated into a road-legal Ferrari since the "F50" was introduced in 1995. It is a sufficiently striking feature to emphasize the special nature of this model, both in terms of functionality and design.

Additionally, the Gurney flap has been redesigned to efficiently manage the trade-off between downforce and drag. There are two configurations: in LD (Low Drag) mode, the movable element lifts and aligns with the fixed section to minimize drag, enhancing longitudinal performance.

In contrast, in HD (High Downforce) mode, the movable element lowers and covers the blown area. The resulting overpressure zone, created by airflow impacting the fixed section, not only generates rear downforce but also redirects the incoming airflow vertically.

Downforce has significantly increased compared to the "SF90 Stradale," resulting in higher braking speeds, which necessitated an upgrade to the braking system. While the front aero calipers are retained, the front discs have been completely redesigned for improved cooling. The rear discs have been enlarged to a diameter of 390 mm, and the brake pads have also been newly designed to maximize contact area and increase the friction coefficient.

The design inherits the engineering philosophy of the "SF90 XX" while asserting its individuality as an XX model through sharp and radical design elements, such as the arrow-shaped front wing and the shape of the wings that occupy the left and right air intakes.

In the "SF90 XX Spider," when the retractable hardtop is stowed, the carbon fiber roll bar protrudes from the rest of the bodywork, visually emphasizing the car's low stance. The roof is also made of carbon fiber and can be opened or closed in 14 seconds while driving at speeds up to 45 km/h.

The "SF90 XX Stradale" and "SF90 XX Spider" have become the highest-performing road cars in Ferrari's history. They are rare vehicles that can be enjoyed on both the track and city streets.