The BYD Dolphin can be judged for long-distance travel by looking at its space, output and running-efficiency figures together. Relevant information includes 2026 490km Premium Extended: 4290 mm; 2026 410km Dynamic Standard: 4290 mm; 2025 490km Premium Extended: 4290 mm; 2026 490km Premium Extended: 150 kW; 2026 410km Dynamic Standard: 70 kW; 2 more variants. For owners, long-distance comfort is about more than one number: a stable footprint, enough performance for overtaking and sensible energy use all make highway trips easier to live with.