The Xiaomi SU7 Ultra has established a new Czech speed record for an unmodified, mass-produced road car, reaching 323.35 km/h on the main runway of Hradec Králové Airport. Driven by racing driver Tomáš Vavřinec, the electric sedan surpassed a 20-year-old national record of 309.1 km/h, according to World of engines.
How the 323 km/h Record Run Unfolded in Hradec Králové
The record-setting attempt took place on a 2,400-meter asphalt runway cleared specifically for the test. Airport director Pavel Rind agreed to close the main landing strip after initial negotiations with World of engines editor-in-chief Petr Slováček, leaving only the grass runway operational for aviation traffic. Crews brushed and washed the concrete surface prior to the test runs to maximize traction.
During testing, the vehicle utilized its factory-original Pirelli P Zero tires, sized 265/35ZR21 on the front axle and 305/30ZR21 on the rear. These tires feature Pirelli’s Elect technology, designed specifically to handle the weight and torque profiles of high-performance electric vehicles. Zdeněk Vacl, marketing director of Pirelli for the Czech Republic and Slovakia, noted that the run demonstrated the stability and safety of modern electric powertrains at speeds exceeding 320 km/h, as reported by fDrive.cz and New Evening Prague.
Driver Tomáš Vavřinec completed multiple passes, noting that while the vehicle accelerates to 300 km/h rapidly, the remaining distance required careful calculation for braking zones. The car achieved a peak speed of 323.35 km/h, alongside records across shorter measured distances including a 317.032 km/h average over a flying half-mile, as documented by World of engines.
Powertrain Specifications of the Xiaomi SU7 Ultra
The record-setting vehicle is a standard production model featuring a tri-motor setup consisting of one front motor and two rear motors. This configuration generates a combined output of 1,138 kW (1,538 horsepower) and 1,770 Nm of torque. According to testing data cited by TN.cz, the sedan accelerates from zero to 100 km/h in under two seconds and reaches 200 km/h in 5.86 seconds.
Energy is supplied by a 93.7 kWh CATL Qilin 2.0 NMC battery utilizing an 800-volt architecture capable of supporting ultra-fast charging. Braking duties are handled by 430 mm front and 410 mm rear carbon-ceramic discs paired with six-piston Akebono calipers up front, enabling repeated high-speed stops without thermal degradation.
Technical Breakdown of the Record-Setting Run
- Top Speed: 323.35 km/h (maximum recorded speed for production road cars)
- Flying Kilometers: 314.959 km/h average speed over 1,000 meters
- Flying Half-Mile: 317.032 km/h average speed
Frequently Asked Questions About the Record Run
Was the Xiaomi SU7 Ultra modified for the record?
No modifications were made to the vehicle. Organizers and drivers confirmed that the car used in the test was a standard, unmodified production model that drove to the airport on public roads and departed the same way after the tests concluded, as reported by Autohled.cz.
Who verified and organized the attempt?
The project was organized by the automotive publication World of engines in cooperation with racing driver Tomáš Vavřinec, utilizing the facilities of Hradec Králové Airport under an agreement with airport director Pavel Rind.
What tires were used on the vehicle?
The car ran on factory-spec Pirelli P Zero tires featuring Elect technology, sized 265/35ZR21 on the front and 305/30ZR21 on the rear, which are standard equipment for the SU7 Ultra model.