Ferrari

SF90 Stradale

Ferrari SF90 Stradale: Electrifying the Prancing Horse

The automotive landscape is shifting, and even the most traditional, emotionally driven brands must adapt. For Ferrari, the answer to the impending electrification of the supercar segment wasn’t a compromise; it was an overwhelming display of force. Unveiled in 2019 to celebrate the 90th anniversary of the Scuderia Ferrari racing team, the Ferrari SF90 Stradale became the most powerful, most technologically advanced road car ever to roll out of the gates at Maranello.

It was a watershed moment. The SF90 Stradale is not just Ferrari’s first Plug-in Hybrid Electric Vehicle (PHEV); it is the first mid-engine Ferrari to feature all-wheel drive, and the first series-production Ferrari to challenge the hypercar performance figures previously reserved for the multi-million-dollar LaFerrari.

The Hybrid Heart: 1,000 CV of Complexity

The powertrain of the SF90 Stradale is a masterpiece of complex engineering, seamlessly blending internal combustion with advanced electrification. It consists of four distinct power sources working in absolute harmony.

1. The F154 FA V8 Engine

At the core sits a heavily revised version of the award-winning F154 twin-turbocharged V8, the same fundamental architecture found in the F8 Tributo. However, for the SF90, displacement was increased from 3.9 liters to 4.0 liters (3,990 cc) by boring out the cylinders.

The intake and exhaust systems were entirely redesigned. The cylinder heads are narrower, the fuel injectors now operate at a massive 350 bar of pressure for better atomization, and the turbochargers are equipped with electronically controlled wastegates for unprecedented precision. The exhaust manifold is cast from Inconel (a superalloy used in Formula 1) rather than steel, saving weight and handling extreme temperatures. On its own, this combustion engine produces a staggering 780 cv (769 hp) at 7,500 rpm.

2. The RAC-e (Front Axle)

The SF90 marks Ferrari’s first foray into all-wheel drive for a mid-engine sports car. The front axle is completely independent of the combustion engine. It houses two independent electric motors—one for each front wheel—collectively known as the RAC-e (Regolatore Assetto Curva Elettrico).

These motors provide 162 kW (220 cv) of power and allow for full torque vectoring. By precisely varying the torque applied to the inside and outside front wheels, the RAC-e system can physically pull the car into a corner, virtually eliminating understeer.

3. The MGUK (Rear Axle)

Sandwiched between the V8 engine and the 8-speed dual-clutch transmission is a third electric motor, derived directly from Formula 1 technology. Known as the MGUK (Motor Generator Unit, Kinetic), it provides an additional surge of torque to the rear wheels and serves as the starter motor for the V8.

When all systems are fully deployed in “Qualify” mode, the SF90 Stradale generates a combined, hypercar-shaming output of 1,000 cv (986 hp).

The eManettino: Four Personalities

Managing 1,000 horsepower and four distinct motors requires immense computing power. The driver controls this complexity via a new addition to the steering wheel: the eManettino. It offers four distinct operating modes:

  1. eDrive: The internal combustion engine remains off. The SF90 operates purely as a front-wheel-drive electric vehicle, capable of traveling up to 25 km (15 miles) in total silence at speeds up to 135 km/h. This is perfect for sneaking out of affluent neighborhoods or navigating zero-emission city zones.
  2. Hybrid: The default mode. The car’s brain seamlessly switches between electric and combustion power to maximize efficiency, shutting down the V8 whenever possible.
  3. Performance: The V8 runs constantly, ensuring the high-voltage battery (a 7.9 kWh lithium-ion pack located just behind the seats) is always charged. This guarantees that full electric assist is available instantly when the driver demands it.
  4. Qualify: The nuclear option. The system prioritizes maximum performance over battery charging, allowing the electric motors to deploy their absolute maximum output for the ultimate lap time.

Aerodynamics and the “Shut-off Gurney”

Stylistically, the SF90 Stradale was penned by the Ferrari Styling Centre under Flavio Manzoni. It represents a radical departure from the berlinettas of the past two decades. The cabin is pushed further forward to accommodate the hybrid hardware, and the rear deck is incredibly low, dominated by high-mounted exhaust pipes.

Aerodynamics dictated every surface. The front bumper features vortex generators and a complex double-profile wing to manage air under the car. But the most innovative aerodynamic feature is located at the rear: the Shut-off Gurney.

Unlike traditional active rear wings that rise into the airflow to create drag and downforce, the Shut-off Gurney works inversely. The rear spoiler is divided into two sections. At high speeds on a straightaway, the two sections align, allowing air to flow smoothly over and under the wing to minimize drag. Under heavy braking or hard cornering, an electric actuator lowers the front section, effectively blocking the lower airflow path. This forces all the air over the upper element, instantly generating 390 kg (860 lbs) of downforce at 250 km/h.

The 8-Speed Transmission and “Virtual Reverse”

To handle the immense torque and complex power delivery, Ferrari developed an entirely new 8-speed dual-clutch transmission. It is smaller, 10 kg lighter, and shifts 30% faster than the 7-speed unit in the 488 Pista.

Crucially, the physical transmission does not have a reverse gear. To save weight and complexity in the gearbox, reversing the SF90 Stradale is handled entirely by the two electric motors on the front axle. When you put the car in reverse, you are driving a front-wheel-drive EV.

A Digital Revolution Inside

The interior of the SF90 Stradale marked a complete paradigm shift for Ferrari’s Human-Machine Interface (HMI). Gone are the traditional analog tachometers that defined Maranello’s dashboards for decades. In its place is a massive, curved 16-inch digital instrument cluster.

The steering wheel was entirely redesigned, introducing haptic touch controls for almost every function, including starting the engine. While some purists bemoaned the loss of tactile buttons and analog gauges, the digital interface was necessary to display the incredibly complex flow of energy between the battery, the motors, and the V8.

The Assetto Fiorano Package

For those seeking the ultimate track weapon, Ferrari offered the Assetto Fiorano package. This specification replaced the standard adaptive dampers with Multimatic shock absorbers optimized for track use. It also stripped 30 kg of weight through the extensive use of carbon fiber (door panels, underbody) and titanium (exhaust, springs). It also came equipped with much stickier Michelin Pilot Sport Cup 2 tires and a high-downforce carbon fiber rear spoiler.

The Dawn of a New Era

The Ferrari SF90 Stradale proved that hybridization is not just a tool for meeting emissions regulations; it is the key to unlocking levels of performance previously thought impossible for a road car.

It accelerates from 0-100 km/h (62 mph) in 2.5 seconds, reaches 200 km/h (124 mph) in 6.7 seconds, and laps Ferrari’s Fiorano test track in 1:19.0—a full second faster than the LaFerrari. It completely rewrote the rulebook for the supercar segment, demonstrating that the future of the Prancing Horse is not only safe but blindingly fast.