The 2021 Ferrari SF90 Spider is the successor of the SF 90 Stradale Coupé, which was introduced earlier this year. Formula One Ferraris are always powered by a hybrid, and this hybrid is included in the F3 Ferrari F4, F5 and F6 cars, as well as in the new F7 Ferrari 458 Italia.
The engine consists of a centrally mounted twin-turbo V-8 turbo engine with a single module mounted in the middle and an electric motor mounted above it. The electric motors are developed from a combination of two-wheel drive and four-speed manual transmission and are mounted at the rear of the car, in a double wishbone configuration and on the front axle.
The 7.9 kWh battery allows the SF90 to drive up to 15 miles with pure electrical energy. The front axle is mounted in a double wishbone configuration, with one wheel driven by an electric motor and the other by a two-wheel drive. E - an engine that transfers the torque from the front axle to the front axle to improve agility and stability, giving the driver more power when exiting corners than when relying on the rear axle alone to drive.
Ferrari had always wanted to build a convertible version of the SF90, says Ferrari's head of technology Michael Leiters, but the car was designed in such a way that removing the fixed roof from the outset reduced the need for rear-wheel drive and the lack of a powertrain. The front and rear axles, rear diffuser and steering wheel are identical, which makes it clear that the chassis for the coupé should be as stiff as possible, in line with Ferrari's long-term strategy of maintaining the sporty design of its sports cars.
The retractable hardtop, which can be raised and lowered in just 14 seconds, is made of aluminium and saves on steel hardtops. The SF90 Spider weighs about 220 pounds more than the Stradale, but has different and stronger doors to meet the side impact requirements.
The roof system, which debuted in the Ferrari 458 Spider in 2011, requires only 1.5 pounds more weight than the other systems required. This means that it is lighter and more efficient, but also more expensive than the previous generation of the system.
The roof of the SF90 Spider is almost identical to the one of the coupé in terms of aerodynamic downforce, "says Leiters. This means that the air that flows from the engine compartment through the roof into the storage compartment and the extendable hardtop is kept as cool as possible. The hot air is cooled by radiators that lead it to the side areas of the underbody. It is then vented through a storage compartment and the extendable and hardtops that are effectively located in the engine compartment.
Like the Stradale, the Spider has a four-speed manual gearbox with manual transmission and a single-cylinder engine with 180 hp.
The patented system is designed to generate up to 860 pounds of downforce at 160 mph, and the central element of the wing falls off and stops the flow, effectively creating a giant gurney flap. The downforce is compensated at the front axle by a floor-mounted vortex generator and a high-speed air-to-air converter.
Michael Leiter is confident he will find buyers other than the Stradale, and Ferrari expects the Spider to account for about 50 percent of SF90 sales. Customers who are more focused on performance will take the coupe because it's a bit better, with less weight and more rigidity. But if you prefer to concentrate a little more on driving emotions, the Spider is the better solution for you. As engineers spent more time optimizing the Spider's aerodynamics, they claim that its underbody now generates more downforce than any other road - toward Ferrari.
To increase the emotional quotient of the SF90 Spider, Ferrari engineers have spent a lot of time amplifying the noise of the internal combustion engine with the roof closed by a heat-resistant diaphragm that amplifies the sound from the exhaust directly above the turbocharger, while it is dampened by catalytic converters and gasoline particulate filters and conducted into the cabin. It used to be thought of simply building a fast car, but the expense of such details shows how much Ferrari has changed.
Resonator technology is one reason why Ferrari has invested heavily, Leiter says, and we can't afford to ask him what he has to say about it, but he says Ferrari engineers also have a lot of data showing how their cars sound. With the technology in supercars, it is possible to increase responsiveness and control emotions at the same time. For me, emotion comes from feeling acceleration, "says Leiter," and Ferrari is about controlling emotion. The first SF90 Spiders will arrive in the US next autumn, but a price has not yet been set, he said.
Given the premium Ferrari traditionally charges for convertibles, not much over $85,000 is expected, and the SF90 Stradale sticker is on sale for $625,000. The Spider is available with the Assetto Fiorano package, which includes a track shock - proven to be optimized for use on the track -, carbon fiber and titanium parts to reduce overall weight by 46 pounds and improve performance in dry conditions.
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