BMW i4 vs BYD SEAL

Side-by-Side Specs

Charging Speed

The BMW i4 has a peak DC charging speed of 207 kW, which is roughly 38% faster than the BYD SEAL at 150 kW. In practice, peak speed only tells part of the story. The charging curve, battery temperature, and state of charge all affect how quickly your car actually charges.

The BYD SEAL runs on an 800V architecture, which typically delivers faster and more consistent DC charging throughout the session. The BMW i4 uses a 400V platform, which is more common but generally sees steeper charging curve drop-off above 50% state of charge.

For the 10-80% charge (the most common DC fast charging scenario), the BMW i4 finishes in about 32 minutes, which is 4 minutes quicker than the BYD SEAL at 36 minutes. On a road trip, that difference adds up over multiple stops.

Range and Efficiency

The BMW i4 offers 515 km of real-world range, which is 35 km more than the BYD SEAL at 480 km. These are real-world estimates, not WLTP numbers. Expect your actual range to vary with speed, weather, terrain, and driving style.

Efficiency matters more than battery size for daily driving costs. The BMW i4 consumes 157 Wh/km, compared to 172 Wh/km for the BYD SEAL. That means the BMW i4 uses less energy per kilometer, which translates to lower charging costs and fewer charging stops on longer drives.

A more efficient car does not always mean more range. Battery size plays a role too. The BMW i4 has a 80.7 kWh useable battery , while the BYD SEAL has 82.5 kWh.

Cold Weather Charging

Both the BMW i4 and BYD SEAL come with a heat pump as standard, which helps preserve range in cold weather by heating the cabin more efficiently.

Battery preconditioning is equally important for winter DC fast charging. When the battery is cold, charging speeds drop significantly. The BMW i4 supports preconditioning, while the BYD SEAL does not. This can mean noticeably slower winter charging for the BYD SEAL.

In cold conditions, expect 20-35% range loss compared to ideal weather. Cars with both a heat pump and preconditioning typically handle winter better overall.

Which One Should You Choose?

If fast charging speed is your priority, the BMW i4 has the edge with 207 kW peak DC and a 32-minute 10-80% time. For long road trips with multiple charging stops, that faster turnaround makes a real difference.

If you mostly charge at home or at work and care more about daily driving costs, the BMW i4 is the more efficient choice at 157 Wh/km. Lower consumption means lower electricity bills over time.

For maximum range between charges, the BMW i4 gives you 515 km of real-world range, which is 35 km more. Both are capable EVs. The best choice depends on how you charge and how far you drive.