What the Bugatti Rimac test track does
The Bugatti Rimac test track in Velika Gorica, Croatia, is a private facility where manufacturers test high-performance and electric vehicles under controlled conditions. Because you arrived from emissions testing information, it's worth understanding that this track serves a different purpose than the standard emissions labs you may have read about — it's where manufacturers validate how their vehicles perform in real-world driving before those vehicles go through official emissions testing elsewhere.
Bugatti Rimac is a Croatian hypercar manufacturer that builds electric and hybrid supercars. The Velika Gorica facility includes both manufacturing space and a test track where engineers can measure acceleration, handling, battery performance, and powertrain behavior. When a manufacturer needs to understand how a vehicle actually behaves on pavement — not just in a laboratory chamber — a private test track like this one provides that data.
This is not where emissions compliance testing happens. That occurs at certified emissions testing facilities using standardized procedures. But the data gathered at a manufacturer's own track informs how the vehicle is tuned and calibrated before it enters the official testing process.
Key Takeaways
- Bugatti Rimac's test track in Velika Gorica is a private facility used by the manufacturer to test vehicle performance, not a public emissions testing center.
- The track allows engineers to gather real-world performance data on acceleration, battery systems, and powertrain behavior before official emissions testing.
- Official emissions testing still happens at separate certified laboratories using standardized test procedures, not on manufacturer test tracks.
- High-performance and electric vehicle manufacturers use private tracks like this one to validate engineering decisions that affect emissions outcomes.
How manufacturer test tracks fit into the emissions process
When a vehicle manufacturer designs a new car, they don't go straight from the design phase to official emissions testing. Engineers first need to understand how the vehicle actually performs under various conditions — how the engine or battery responds to acceleration, how the cooling systems work, whether the emissions control equipment functions as intended. A private test track provides that intermediate step.
At Velika Gorica, Bugatti Rimac engineers can run vehicles through repeated cycles, measure real-time data from sensors, and make adjustments to engine tuning, software, or hardware. Once they're confident the vehicle meets their performance and emissions targets, it moves to the next phase: official testing at a certified emissions laboratory, where standardized procedures measure tailpipe or battery output against regulatory limits.
The relationship is sequential, not overlapping. Private testing informs the vehicle's design. Official testing verifies compliance. A manufacturer that skips the private testing phase often discovers problems during official testing, which delays certification and increases costs.
Why Bugatti Rimac uses a dedicated test facility
Bugatti Rimac manufactures hypercars — vehicles with extreme performance specifications and cutting-edge electric or hybrid powertrains. These are not mass-market vehicles, and their engineering is highly specialized. A dedicated test track allows the company to validate systems that standard test facilities may not be equipped to measure.
Electric hypercars, in particular, require testing of battery thermal management, high-voltage system behavior, and regenerative braking performance under extreme acceleration. A private track lets engineers stress-test these systems repeatedly without the constraints of a public road or a standardized laboratory protocol. The data they gather helps them understand how the vehicle will perform during official emissions and safety testing.
Velika Gorica, located near Zagreb, was chosen as the site for Bugatti Rimac's headquarters and manufacturing facility. The test track is integrated into the same campus, which reduces the time and cost of moving vehicles between design, manufacturing, and testing phases.
The difference between private testing and official emissions testing
Private test tracks and official emissions laboratories measure different things using different methods. On a private track, engineers can measure whatever they choose — acceleration times, battery temperature, motor efficiency, real-world fuel consumption. The data is proprietary and used only by the manufacturer to refine the vehicle.
Official emissions testing uses a standardized procedure set by regulatory bodies. In the European Union, where Bugatti Rimac operates, vehicles are tested using the WLTP (Worldwide Harmonized Light-Duty Vehicles Test Procedure). The test is conducted in a laboratory on a dynamometer — a machine that simulates road resistance — and measures specific pollutants under specific driving conditions. The results are public and determine whether the vehicle meets legal limits.
A vehicle can perform well on a private test track but still fail official emissions testing if the manufacturer misunderstood how the vehicle would behave under the standardized test conditions. Conversely, a vehicle that passes official testing may not perform as well in real-world driving as the private track data suggested — which is why real-world emissions have become a focus of regulatory attention in recent years.
What happens to test data after private testing
Data gathered at Bugatti Rimac's test track remains the property of the company. Engineers use it to make decisions about calibration, component selection, and software tuning. Some findings may be published in technical papers or shared with suppliers, but the detailed performance data is confidential.
When the vehicle is ready for official testing, Bugatti Rimac submits it to a certified emissions laboratory along with technical documentation. The laboratory conducts its own independent testing and generates a report. That report — not the private track data — becomes the official record of the vehicle's emissions performance and is what regulators review for compliance.
If a vehicle fails official testing, the manufacturer can return to the private track to identify the problem, make adjustments, and test again before resubmitting to the official laboratory. This cycle can repeat several times, which is why manufacturers with well-equipped private facilities often reach compliance faster than those without them.
Electric vehicles and test track requirements
Electric hypercars like those built by Bugatti Rimac present unique testing challenges. Battery performance, thermal management, and high-voltage system safety all need to be validated before official testing. A private test track allows engineers to run the vehicle through repeated charge-discharge cycles, measure battery degradation, and test the cooling systems under real driving loads.
For electric vehicles, official emissions testing measures energy consumption (expressed in kilowatt-hours per 100 kilometers) rather than tailpipe emissions. But the vehicle's efficiency depends heavily on how well the battery, motor, and thermal systems work together — something that can only be fully understood through real-world testing on a track where engineers can control variables and gather detailed sensor data.
Bugatti Rimac's test facility includes charging infrastructure and battery monitoring equipment that allows the company to understand how their vehicles will perform during the official WLTP test, which includes both highway and city driving simulation.
Frequently Asked Questions
Is the Bugatti Rimac test track open to the public?
No. The Velika Gorica facility is a private manufacturing and testing campus. It is not open for public driving or tours. The track is used exclusively by Bugatti Rimac engineers and test drivers for vehicle development and validation.
Do vehicles tested at Bugatti Rimac still have to pass official emissions testing?
Yes. Private testing does not replace official testing. Every vehicle Bugatti Rimac manufactures must be tested at a certified emissions laboratory and meet regulatory limits before it can be sold. The private track is a step in the development process, not a substitute for compliance testing.
What makes a test track different from a dynamometer laboratory?
A test track is an actual paved circuit where vehicles drive at real speeds and experience real road conditions. A dynamometer is a machine in a laboratory that simulates road resistance while the vehicle stays in one place. Tracks provide real-world data; dynamometers provide standardized, repeatable measurements for compliance.
Why do manufacturers need private test tracks if official testing exists?
Official testing measures compliance with regulations, but it doesn't tell engineers how to build a compliant vehicle. Private testing lets manufacturers understand their vehicle's behavior, identify problems early, and make adjustments before official testing. This reduces the cost and time of reaching compliance.
Does testing at Velika Gorica affect emissions standards in other countries?
No. Bugatti Rimac's private testing is used only to develop their own vehicles. Each country or region has its own emissions standards and testing procedures. A vehicle tested in Croatia must still meet the emissions limits of any country where it will be sold.