Tatuus F4-T421: Engineering the Next Generation of Formula 4
The Tatuus F4-T421 represents a pivotal step in the evolution of junior formula racing. Designed, developed, and manufactured by the Italian specialist Tatuus, this open-wheel race car serves as the standard for the second generation of Formula 4 since its debut in 2021. Replacing the Tatuus F4-T014, the T421 is engineered to provide a competitive and safe environment for aspiring drivers transitioning into professional motorsport.
At its core, the F4-T421 balances lightweight agility with robust structural integrity, ensuring that drivers can master the fundamentals of high-downforce racing while maintaining a high standard of safety.
Key Facts
- Manufacturer: Tatuus (Italy).
- Debut Year: 2021.
- Engine: 1.368 cc turbocharged inline-4.
- Power Output: 180–185 hp.
- Weight: 570 kg (including driver).
- Transmission: 6-speed semi-automatic sequential.
Technical Architecture and Chassis
The foundation of the Tatuus F4-T421 is a carbon-fiber monocoque—a structural skin that acts as the primary load-bearing member and safety cell for the driver—complemented by a lightweight fiberglass body. This combination ensures maximum rigidity and minimum weight.
Dimensions and Geometry
The vehicle is designed for stability and precision handling. It features a wheelbase of 2,750 mm and a height of 950 mm. The axle track is slightly wider at the front (1,510 mm) than at the rear (1,460 mm), a configuration that helps optimize steering response and cornering balance.
Suspension and Braking
Both the front and rear of the car utilize a push-rod suspension system. This setup employs twin non-adjustable shock absorbers, an adjustable anti-roll bar to control body roll, and a third element to fine-tune the car's aerodynamic platform. To bring the car to a halt with precision, it is equipped with 4-piston aluminum calipers paired with ventilated brake discs, which dissipate heat more efficiently during intense racing conditions.
Powertrain and Performance
The Tatuus F4-T421 is powered by an Abarth FT-J / Autotecnica engine. This 1,368 cc DOHC (Double Overhead Cam) inline-4 turbocharged engine is mounted longitudinally in a mid-engined layout, providing an ideal center of gravity for rear-wheel drive dynamics.
The engine produces between 180 and 185 hp, delivering a power-to-weight ratio that is highly competitive for the Formula 4 category. Power is transferred to the wheels via a Sadev SLR75-14 6-speed semi-automatic sequential gearbox, allowing for rapid gear changes without the need for a traditional clutch during shifts.
| Category | Specification |
|---|---|
| Chassis | Carbon-fiber monocoque / Fiberglass body |
| Engine | Abarth FT-J 1.368 cc Turbocharged I4 |
| Power | 180–185 hp |
| Transmission | Sadev 6-speed semi-automatic sequential |
| Weight | 570 kg (with driver) |
| Wheelbase | 2,750 mm |
| Brakes | 4-piston aluminum calipers / Ventilated discs |
Frequently Asked Questions
When did the Tatuus F4-T421 make its debut?
The Tatuus F4-T421 debuted in 2021 as the vehicle for the second generation of Formula 4.
What engine powers the F4-T421?
It is powered by a longitudinally mounted Abarth FT-J / Autotecnica 1,368 cc DOHC inline-4 turbocharged engine.
What is the total weight of the car including the driver?
The total weight of the vehicle, including the driver, is 570 kg.
What type of gearbox is used in this race car?
The car uses a Sadev SLR75-14 6-speed semi-automatic sequential gearbox.
What materials are used for the chassis and body?
The chassis consists of a carbon-fiber monocoque, while the body is made from fiberglass.