BYD Seagull vs Xiaomi SU7 Ultra: Which EV is better?
Head-to-head: BYD Seagull vs Xiaomi SU7 Ultra. Compare real range, efficiency, charging time, price, rating and running costs to find the best electric vehicle for you in 2026.
Our verdict
Xiaomi SU7 Ultra wins this head-to-head
It wins 5 of 8 categories compared below, with a margin of 3 category wins.
The numbers that matter
Real, comparable stats from our database. The green value wins each category.
| Specification | Seagull | SU7 Ultra |
|---|---|---|
| Range SU7 Ultra wins | 305 km | 630 km |
| Battery SU7 Ultra wins | 30.1 kWh | 93.7 kWh |
| Efficiency Seagull wins | 9.9 kWh/100km | 16.4 kWh/100km |
| 0-100 km/h SU7 Ultra wins | 13 s | 1.98 s |
| Fast charge 10-80% | ~0 min | ~25 min |
| Seats SU7 Ultra wins | 4 | 5 |
| Price Seagull wins | $10,000 | $82,400 |
| Rating SU7 Ultra wins | 4.0 / 5 | 4.8 / 5 |
| Est. running cost / yr | $223/yr | $369/yr |
View the full specification sheet
| Specification | Seagull | SU7 Ultra |
|---|---|---|
| Battery | 30.08 kWh (LFP Blade) | 93.7 kWh |
| Range | 305 km (CLTC) | 630 km (CLTC) |
| Top speed | 130 km/h | 350 km/h |
| Power | FWD · 74 hp | Tri-motor AWD · 1,548 hp |
| 0-100 km/h | ~13 s | 1.98 s |
| Charging | AC ~4 h / DC opt. | — |
| Drive | FWD | Tri-motor AWD |
| Efficiency | 9.9 kWh/100 km | 16.4 kWh/100 km |
| Seats | 4 | 5 |
| Cargo | 130 L | 480 L |
| Charging (10-80%) | — | ~25 min (800V) |
BYD Seagull
Pros
- Incredibly cheap
- Tiny and easy to park
- Well equipped
- Low running costs
Cons
- City-only range
- Basic safety kit
- Slow charging
- No real boot
Xiaomi SU7 Ultra
Pros
- Ridiculous performance
- Track-ready hardware
- Practical cabin
- Very fast charging
Cons
- Very expensive
- Tri-motor drains power
- Young brand
- Tight rear headroom
Frequently asked questions
Is the Xiaomi SU7 Ultra really better than BYD Seagull?
Our verdict is based on real specs: range, battery, efficiency, acceleration, charging speed, seats, price and rating. The winner wins the majority of those categories, but the right choice depends on your budget, driving style and priorities.
Which has more range, BYD Seagull or Xiaomi SU7 Ultra?
305 km vs 630 km respectively, before factoring in weather and driving conditions.
Which is cheaper to run?
Based on official efficiency and a typical $0.15/kWh tariff at 15,000 km per year, running costs are estimated at $223/yr for the BYD Seagull and $369/yr for the Xiaomi SU7 Ultra.
Should I compare more models?
Yes - add both models to our interactive comparator to see every spec side by side, or use the Which EV quiz to find more models that fit your budget and lifestyle.
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Not sure which one is right for you?
Add these models to our interactive comparator and compare every spec side by side, or take the quiz to find even more matches.