The updated 2026 Xiaomi SU7 Max has set a new world record for mass-produced electric vehicles by traveling 4,264 km in a 24-hour high-speed endurance test on a 7.8 km oval track in Yancheng, China. Maintaining speeds up to 240 km/h, it surpassed the previous record of 3,961 km set by the Xpeng P7, as well as marks from Porsche Taycan (3,425 km) and Mercedes-Benz CLA (3,717 km). This achievement highlights advancing EV thermal management and charging tech, showing mass-produced sedans can endure extreme conditions at a price of RMB 309,900.
Xiaomi’s Rapid Rise in EVs
Xiaomi entered the electric vehicle market in 2021 with Xiaomi EV, launching its first model, the SU7 sedan, on March 28, 2024, as a direct rival to the Tesla Model 3. Best known for smartphones, the Beijing-based company delivered over 411,000 vehicles in 2025, rapidly gaining market share in China’s competitive EV landscape. The updated SU7 Max, entering pre-sale on January 7, 2026, and set for official launch in April 2026, represents a mid-term refresh with hardware upgrades rather than a full redesign.
CEO Lei Jun described the test as “running a marathon at sprint speed,” emphasizing the strain on batteries and motors from sustained high speeds. Conducted from 10:10 pm on November 20, 2025, to 10:10 pm on November 21, 2025, at a CATARC proving ground, the test validated the car’s stability under continuous high-load operation, including charging stops.
Key Specifications
| Specification | Details |
|---|---|
| Distance in 24-Hour Test | 4,264 km |
| Test Track | 7.8 km oval, Yancheng, China |
| Average/Test Speed | Up to 240 km/h |
| Top Speed | 265 km/h |
| Power Output | 495-508 kW (673-681 hp) |
| Torque | 838 Nm |
| Motors | V6s Plus (22,000 rpm) |
| Battery | 101.7 kWh ternary NMC |
| Voltage Architecture | 897V |
| CLTC Range | 835 km |
| 15-Min Charge | 670 km range added |
| Dimensions (L/W/H/WB) | 4,997 / 1,963 / 1,440 mm / 3,000 mm |
| Price (Pre-sale) | RMB 309,900 (€37,960 / $44,470) |
| Airbags | 9 (incl. rear side) |
Technical Breakdown: What Enabled the Record
The SU7 Max’s success stems from its 897V high-voltage architecture and advanced thermal management system, borrowed from the SU7 Ultra. This kept the 101.7 kWh ternary NMC battery cool during sustained 240 km/h runs, preventing thermal throttling and enabling 5.2C peak charging up to 530 kW. The V6s Plus motors, spinning at 22,000 rpm, deliver 495-508 kW total power and support a 265 km/h top speed, with 1.5% improved CLTC efficiency.
Charging efficiency proved critical: the car added 670 km of CLTC range in 15 minutes multiple times, minimizing downtime. Safety features include a 2,200 MPa anti-roll structure, 1,500 MPa underbody crossbeam, protective coating, and nine airbags. At 4,997 mm long with a 3,000 mm wheelbase, it offers family sedan space despite performance credentials.
Performance Under Extremes
This test pushes beyond typical WLTP or EPA cycles, simulating real-world high-speed endurance with heat buildup that degrades most EVs. Xiaomi’s system maintained output without failure, beating luxury rivals like Taycan and CLA, which use similar but less optimized setups. However, real-world results may vary outside controlled tracks, and CLTC ranges overstate highway efficiency.
Unanswered questions remain: exact charging times and energy consumption per lap aren’t detailed, and independent verification is pending. The November 2025 test date suggests pre-production validation, raising curiosity about production consistency.
Market Positioning and Competition
| Model | 24-Hour Distance | Power (kW) | Price (est. equiv.) |
|---|---|---|---|
| Xiaomi SU7 Max (2026) | 4,264 km | 495-508 | RMB 309,900 |
| Xpeng P7 (prev. record) | 3,961 km | Details not confirmed | ~RMB 250,000 |
| Porsche Taycan | 3,425 km | ~300-761 | €100,000+ |
| Mercedes CLA (EV) | 3,717 km | Details not confirmed | €50,000+ |
The SU7 Max undercuts premium competitors while matching or exceeding endurance, positioning it against the Tesla Model 3 and Xpeng P7 in China. Its value at under €38,000 appeals to performance buyers seeking reliability without luxury markups.
Verdict
The Xiaomi SU7 Max’s 4,264 km record solidifies it as a benchmark for mass-produced EV endurance, combining 673+ hp, an 835 km range, and ultra-fast charging in a practical sedan package. Ideal for Chinese buyers wanting Tesla-rivaling speed and space at mainstream prices, it signals Xiaomi’s threat to established players—but global availability and long-term durability need real-world proof. Enthusiasts prioritizing track-proven tech should watch the April launch closely.
