BYD is pushing the small electric hatchback battle into a new phase with the latest update to the Seagull, also known as Atto 1. The model has now appeared in China’s Ministry of Industry and Information Technology declaration catalog on July 10, 2026, a sign that production preparation is moving forward.
The most noticeable change is not only a cleaner and more proportionate look, but also a clear increase in body size. According to information published by CarNewsChina and cited by radarmadura.jawapos.com, the newest BYD Atto 1 now measures 4,205 mm in length, 1,810 mm in width, and 1,570 mm in height.
| Dimension | New BYD Atto 1 | Key Change |
|---|---|---|
| Length | 4,205 mm | Larger than the previous model |
| Width | 1,810 mm | Looks more proportionate |
| Height | 1,570 mm | Body design appears more mature |
| Wheelbase | 2,650 mm | Grows by around 150 mm |
The longer wheelbase should translate into a roomier cabin, especially for rear passengers. A gain of around 150 mm in wheelbase is also expected to improve legroom for everyday use.
Closer to the Dolphin
The larger footprint also brings the Atto 1 closer to the BYD Dolphin, which sits one step above it in the lineup. With a body now exceeding four meters, the model no longer feels as small as its earlier generation.
That shift matters because the compact electric hatchback segment has become increasingly crowded. BYD appears to be positioning the Atto 1 as a more mature alternative without losing the practical city-car character that made the name relevant in the first place.
More than a size upgrade
The new version is also reported to bring performance improvements over the outgoing model. BYD seems intent on making sure the update is not limited to styling and dimensions, but also delivers a better driving experience.
A new vehicle platform is part of that development. The updated architecture is said to support more efficient space usage while also helping improve performance and driving stability.
With that combination, the newest Atto 1 is being prepared for both urban commuting and longer trips. It also reflects BYD’s strategy of broadening the appeal of compact electric cars in an increasingly competitive market.
BYD remains one of the most aggressive electric vehicle developers for global markets. The Atto 1 is a key product because it targets buyers who want a compact electric car that stays practical for daily use.
What the MIIT filing signals
The model’s appearance in the MIIT catalog is an important step before an official market launch. Such filings typically indicate that mass production is getting close.
Buyers are now waiting for full specifications and pricing details. If the production version keeps the announced changes, the Atto 1 could become one of the stronger contenders in the compact electric segment.
For now, the biggest takeaway is clear: BYD has made the Atto 1 larger, more mature, and potentially more capable than before. That combination is exactly the kind of update that forces rivals in the city EV class to pay attention.
