Ferrari SF90 Stradale, 1000 HP projected towards the future



Presented on May 29, 2019, the Ferrari SF90 Stradale is the first production plug-in hybrid model in its glorious history, marking the beginning of a new era in the supercar industry.


In fact, the SF90 is not only the heir to the eight-cylinder mid-engined sports cars, but creates a totally new family of products within the Ferrari range, positioning itself between the 812 Superfast and LaFerrari.


The SF90 Stradale, despite being a production car, manages to match the performance of the LaFerrari hyper-car, and its name is a clear tribute to the Formula One single-seater that runs parallel in the 2019 season, underlining and celebrating the close link between the Maranello house and car racing, a philosophical and methodological contact.



The central point of the whole project is the engine, now called the power unit, which consists of a 780 hp thermal component plus three electric motors capable of delivering 220 HP, which added together reach 1000 hp: a round figure that makes of the SF90 Stradale, the most powerful production Ferrari ever.


The internal combustion engine, code F154 FA, evolution of the eight-cylinder award-winning multiple times globally, grows in size, becoming a displacement 3990 cm³, following the increase in bore, which went from 86.8 to 88 millimeters. Other improvements, compared to the engine mounted on the F8 Tributo, concern the internal fluid dynamics to increase the fuel injection pressure, the updated intake and exhaust system, and the electronically controlled wastgate valves, in order to reduce the response time of the turbo.


The evolutionary development work allows the eight-cylinder bi-turbo to reach 780 hp with a torque value of 800 Nm, to which must be added the 220 hp of the three electric motors capable of providing an additional 800 Nm of torque.



The electric motor mounted at the rear, between the endothermic engine and the gearbox, is named MGUK (Motor Generation Unit, Kinetic) just as happens in the Formula One single-seaters, underlining the derivation of the mechanical components. The two motors located at the front, one per wheel, also act as torque vectoring, that is, they regulate the torque and manage the traction to be transferred to the individual front wheels.


This system, called RAC-e (Electric Curve Trim Adjuster), improves cornering, support and traction, to the point of removing, in terms of sensation, 200 kg from the empty mass: the SF90 Stradale, while weighing 1570 kg, with this device it behaves as if it weighs 1370.



The two front engines also manage reverse gear which disappears from the traditional gearbox, now eight-speed, 10 kg lighter and mounted 15 millimeters lower than the 488 family.


With such a complicated power train, the work on the part of the technicians is concentrated mainly on lowering the center of gravity of the car, 1186 millimeters above the ground.


Another crucial aspect is aerodynamics, which serves both to cool the engine that reaches 900° C, and in the dynamics and driving experience, where active aerodynamics plays a fundamental role in performance.



In this case, the Ferrari engineers used an unconventional approach, choosing not to apply flashy wings to create downforce, but finding a series of devices that, by lowering the car, are able to generate the vertical load required by the high speeds reached.


In detail, the strengths from an aerodynamic point of view are three: Vortex generator, Forged wheels, and Shut-off gurney.


The Vortex generation is a flow generator system located in the front part of the floor, to balance the rear aerodynamic load. It is not an absolute novelty for Ferrari, but it is necessary to highlight the study of detail: in fact, to obtain this vortex effect, in the front the frame is more than the central part of only 15 millimeters.



To increase the load of the vertical axle there are two diffusers in front of the front wheels and the shape of the bonnet designed specifically. The forged rims have a particular geometry, mixing the concepts of form and function.


The aesthetics of the wheels have been conceived according to aerodynamic principles and making the most of current technologies: the rims allow to increase the removal of air in the wheel compartment, and to channel the air flows coming out of the rim itself towards the longitudinal flow of the sides.


From an aesthetic and technological point of view, the third element, the Shut-off gurney, is certainly the one that most characterizes the Ferrari SF90 Stradale.


The joint work between technicians and stylists, who had to shape the function in this project, made it possible to create a low and clean tail.



This patented device, situat the rear of the car, it is composed of two elements: a fixed one, where the third central stop is located, and a mobile component, which lowers during braking, when changing direction or when cornering, to increase the vertical load which reaches the value of 390 kg at 250 km/h.


The designers, also led by Flavio Manzoni, were able to work mainly on the proportions deriving from the architecture of the SF90 Stradale, given that many aesthetic details are dictated by technical-aerodynamic and performance functions. Despite these constraints, the task is well done. The very short overhangs and the advanced aeronautical-inspired cockpit stand out, elements capable of transmitting the aggressiveness and stability required by this type of car.



Given the technical and design complexity, the car's distinctive features remain refined and wisely connected to each other, demonstrating the aesthetic research work behind the SF90 Stradale which renounces, so to speak, more or less showy wings in favor of a discreet elegance, where form follows function creating a seductive interplay of lines.


The headlights, both front and rear, also mark the beginning of a new era: the C-shaped front headlights feature matrix Led technology, while the rear lights feature four elements with a new shape while vaguely reminiscent of traditional circular elements.



Greater is the work carried out on the inside by the Ferrari designers, who have revised the Human Machine Interface, making the connection between man and car ever more engaging. The basic concept in the design was to always have your hands on the wheel and your eyes on the road, for total driving control.


In this transition from analog to digital, the driver-pilot remained at the center of attention and the aeronautical theme remains the stylistic line chosen, but the contents are brand new.


The main novelty is the 16" curved display, the first application of this type in the automotive sector, where it is possible to see all the necessary information with well-developed 3D graphics that are projected on the windshield through the Head up Display, to always stay focused while driving.


The central tunnel is revolutionized, but always in the name of tradition: the bridge, where the automatic transmission buttons are present, characteristic and symbol of Ferrari production from 458 onwards, has been replaced by a gate selector, which recalls the legendary grille of the change of the classic Reds. An elegant and innovative example that shows how, even in the details, the creative and stylistic baggage of the Prancing Horse is practically endless.


All physical controls have been replaced by touch screen buttons on the steering wheel, but able to replicate analog feedback once pressed. In addition to the well-known Manettino, a selector that manages driving aids, an e-Manettino has been created, with which you can select the desired driving mode at any time: eDrive, Hybrid, Performance and Qualify.



By setting the eDrive drive, the Ferrari SF90 Stradale uses only the two electric motors mounted on the front, which develop a maximum speed of 135 km/h for a range of 25 km. This, which is the only way to use reverse gear, is perfect for navigating city centers in a silent and sustainable way.


The standard setting, if it can be defined as such, is the Hybrid, where the system automatically manages the internal combustion engine keeping it on or off, based on the necessary power required for the best efficiency of the powertrain.


In Performance, the internal combustion engine is always on, keeping the battery charge of the electric motors high to get full power as soon as the driver needs or feels the desire.


The last available mode, Qualify, allows the 1000 hp of maximum power deriving from the thermal and electrical system to be unloaded to the ground. Here maximum performance is privileged, becoming a reference point for both current Ferraris and competitors.


The performance is simply incredible: top speed over 340 km/h, from 0 to 100 km/h in 2.5 seconds, from 0 to 200 km/h in 6.7 seconds, stopping times from 100 to 0 km/h in less than 29.5 meters.



At Fiorano, the lap of the track is completed by the SF90 Stradale in 79 seconds, with an advantage of 64 meters per lap over the Ferrari LaFerrari.


In less than six years since the presentation of the hypercar, Ferrari has managed to achieve and improve the performance of its previous model on a production car. This result implies a discourse of exploitation: having a wider and more available slice of the market also means opening up to less expert users, but who want to experience strong emotions and learn howgive more and more powerful cars.


For these reasons, fun and driving pleasure are guaranteed at all levels by a new management system for vehicle control, called eSSC, electric Side Slip Control, which works on three areas: eTC, brake-by-control. ware with ABS/EBD, and Torque Vectoring.

The eTC, electronic traction control, adapts to driving and grip conditions by managing and optimizing the torque available on each individual wheel.


The brake-by-ware control divides the braking between the hydraulic and electrical systems, increasing braking performance and felling, as well as allowing regenerative brake recovery.



Torque Vectoring, already mentioned previously, optimizes and manages the torque available on the front wheels, improving driving pleasure and traction when exiting corners.


The price? Starting from 430,000 euros. The price of 500,000 euros is much more realistic, considering the high-performance package called Fiorano. In essence, a hypercar in terms of performance, but one that costs half, or less, than the competition. Once again in the price / performance ratio, the Maranello-based company differs from the competition and revolutionizes the construction methodology of production supercars.


The waiting list is not surprising, with 2000 pre-orders that certify the wait around this model.


This Ferrari is already at the center of many discussions between technicians and enthusiasts, who accuse the SF90 Stradale of not being innovative and of not having paved the way for the competition, therefore they believe that Ferrari was not very brave but, perhaps, they forget that this task has always been the responsibility of the cars of the Prancing Horse in limited editions.


Having reached certain powers and certain performances, all associated with an aesthetic that is perfectly harmonized with the function, will not be innovation in the literary sense of the term, but it is certainly revolution.


A revolution that projects Ferrari, and consequently the world of super sports cars, into a new era: the future.


DATA SHEET


Berlinetta two-door body

Mid-rear engine position

Non-permanent all-wheel drive


Size and Weights


Length 4710 mm

Width 1972 mm

Height 1186 in mm

Front track 1679 mm

Rear track 1652 mm

Wheelbase 2650 mm

Weight distribution 45% front - 55% rear

Unladen mass 1570 Kg

74 liter tank


Engine


Thermal component

Displacement 3,990 cm³

Type V8.90°, bi-turbo

Bore and stroke 88x83 mm

Monobloc in aluminum alloy

Aluminum alloy head

Compression ratio 9.5:1

Distribution four valves per cylinder with double overhead camshaft

Bosch Direct Electronic Fuel Injection


Mechanics


Power 574 kW/780 hp at 8000 rpm

Specific Power 195 hp/liter 144 kW/liter and 201 Nm/liter

Torque 800 Nm at 6,000 rpm

12 V electrical system

Three electric motors, two mounted on the front wheels, one at the rear

Maximum power 162 Kw/220 hp

Battery capacity 7.9 kWh

Transmission


Ferrari F1 automatic transmission, eight-speed double clutch

Frame


Car body in carbon and aluminum alloys

Front suspension electronically controlled shock absorbers

Rear suspension electronically controlled shock absorbers

Front brakes with Brembo CCM-R carbon-ceramic discs Ø 398 mm x 223x38 mm, self-ventilated and perforated, with six-piston calipers

Rear brakes with Brembo CCM-R carbon-ceramic discs Ø 360 mm x 233x32 mm, self-ventilated and perforated, with 4-piston calipers

Front tires 255/35 ZR 9.5 J

Rear tires 315/30 ZR 20 11.5 J

Rims 20"

Consumption and emissions


Emissions 154 g/km (base), 160 g/km (Fiorano package)

Consumption 6.1 liter/100 km (base), 6.0 liter/100km (Fiorano package)


Performance declared


Speed ​​340 Km/h

Acceleration from 0 to 100 km/h in 2.5 seconds, and from 0 to 200 km/h in 6.7 seconds


Luca Saitta