Thailand · Updated September 2026

BYD Dolphin vs Atto 3 vs Sealion 7: is the bigger car worth the money?

These are BYD's three most-shopped EVs in Thailand, and they cost between about ฿510,000 and ฿1.35 million. This guide compares what you actually get at each step up, and when the cheapest one is the right choice.

Dolphin
from ฿509,900
compact hatchback
Atto 3
from ฿669,900
compact SUV
Sealion 7
from ฿1,199,900
mid-size coupe-SUV

The short answer

  • Mostly city driving, two to four people: the Dolphin Extended is the best value. It has the same battery as the Atto 3 Extended, similar rear legroom, and costs about ฿170,000 less.
  • You want an SUV, a bigger boot or a higher seat: the Atto 3. It adds boot space and ride height, not range or rear legroom.
  • Regular long trips, a family with older children, or you need real rear space: the Sealion 7. It's the only one of the three that is truly bigger inside, with a much larger battery and faster charging. It also costs roughly ฿430,000 more than an Atto 3.
  • Prices in Thailand change almost monthly. Everything below is advertised campaign pricing from August–September 2026. Get a dated quotation before you decide.

Side-by-side specs (Thai-market versions)

These are the higher-battery trims most buyers compare. The Dolphin Standard (฿509,900, 50.25 kWh, 95 hp) and Atto 3 Premium (฿669,900, 50.25 kWh) are cheaper entry versions. The Sealion 7 has two faster AWD versions at ฿1,299,900 and ฿1,349,900.

Dolphin ExtendedAtto 3 ExtendedSealion 7 Premium (RWD)
Advertised price*฿599,900฿769,900฿1,199,900
Body5-door hatchbackCompact SUVMid-size coupe-SUV
Length / wheelbase4,290 / 2,700 mm4,455 / 2,720 mm4,830 / 2,930 mm
Boot345 L440 L500 L + 58 L front
Battery (LFP Blade)60.48 kWh60.48 kWh82.5 kWh
Claimed range (NEDC)490 km480 km567 km
Power204 hp204 hp313 hp
Peak DC charging80 kW88 kW150 kW
Where builtRayong, ThailandRayong, ThailandImported (CBU, China)
Warranty (as advertised)8 years / 160,000 km vehicle and battery. Dealer campaigns currently add a "lifetime" battery, motor and controller package. It's conditional, so read the terms.

*Authorised-dealer campaign prices, August–September 2026, for private buyers. They normally already include the EV3.5 government subsidy. List prices before campaign discounts are higher: Dolphin Extended ฿719,900, Atto 3 Extended ฿849,900–899,900 depending on the source, Sealion 7 Premium ฿1,264,900. Specs are from BYD Thailand dealer material. The NEDC range figure is optimistic, as explained below.

What the extra money actually buys

Dolphin Extended → Atto 3 Extended
+ ฿170,000
  • SUV body and higher seating position
  • About 95 L more boot space
  • Slightly faster DC charging (88 vs 80 kW)
  • Not more range: same 60.48 kWh battery
  • Not meaningfully more rear legroom: wheelbase differs by only 20 mm
Worth it if you want the SUV shape or regularly fill the boot. Otherwise you're mostly paying for looks and height.
Atto 3 Extended → Sealion 7 Premium
+ ฿430,000
  • About 36% more battery (82.5 vs 60.5 kWh)
  • About 1.7× faster peak DC charging, so shorter stops on long trips
  • 210 mm more wheelbase: clearly more rear legroom
  • Much quicker (0–100 km/h in about 6.7 s) and a more premium cabin
  • Higher insurance, higher tyre costs, and an imported car
This is a jump to a different class of car. It's worth it if long trips or rear-seat space matter every week, not once a year.
Running costs barely separate them. Charged at home in Thailand, any of the three costs a fraction of petrol per kilometre. The Sealion 7 uses more energy because it's heavier, but the difference is small next to the price gap. The real cost difference is the purchase price, insurance and resale. Run your own numbers in our Thailand EV vs hybrid calculator →

Range: what to expect in real driving

Thai range figures use the NEDC test cycle, which is generous. In real use with the air-con on, you get close to the claimed figure only in slow city driving. At a steady 110–120 km/h on the highway, a compact EV typically uses 20–24 kWh per 100 km. That puts the Dolphin and Atto 3 Extended at roughly 250–300 km on a highway run from 100% to empty, and less if you charge only to 80%.

The Sealion 7's bigger battery gives it a longer highway leg. Its main advantage on a trip like Chiang Mai to Bangkok (about 700 km) is charging speed, because each stop is shorter. All three can make that trip. The difference is how many stops you make and how long each one takes.

These highway figures are our estimates, based on typical consumption for this class of car, not a published BYD figure. Your results depend on speed, load, temperature and terrain. The hilly routes out of Chiang Mai use noticeably more energy.

Space: the question most people get wrong

Many buyers assume the Atto 3 is the family car and the Dolphin is the city car. On paper the difference is smaller than it looks. Rear legroom depends mainly on the wheelbase, and the Dolphin's 2,700 mm is almost the same as the Atto 3's 2,720 mm. The Atto 3 gives you more boot, more headroom and a higher seat. It doesn't give you much more room for the people in the back.

The Sealion 7 is the only one that is a genuinely bigger car inside. It's worth considering if you regularly carry three people in the back, especially teenagers, or need to fit child seats and luggage at the same time.

Try this at the dealer: bring your actual passengers, and your child seats if you use them. Sit them in the back of the Dolphin and Atto 3 for five minutes each. That test settles the question faster than any spec sheet.

Resale and price risk

BYD prices in Thailand have been cut by ฿100,000–200,000 more than once, and that pulls used values down. Used Dolphins and Atto 3s from 2023–24 were listed at roughly 40–55% of their original 2023 prices. These are asking prices, so actual trade-in offers are usually lower. Expect a new BYD to lose value faster than a Toyota or Honda hybrid.

The Sealion 7 is an imported car. In August 2026 there were press reports of a proposal to raise excise tax on imported EVs. No decision had been made when we checked, so treat it as a proposal only. Its price has also moved both ways this year: up about ฿190,000 in January 2026, then down about ฿65,000 in later campaigns.

Which one should you buy?

Best value

BYD Dolphin Extended

≈ ฿599,900
  • Mostly urban driving, with occasional trips between cities
  • One to four regular occupants
  • You want the lowest cost per kilometre in the group
  • Avoid the Standard trim if you drive highways: it has 95 hp and a smaller battery
Middle ground

BYD Atto 3 Extended

≈ ฿769,900
  • You prefer an SUV and a higher driving position
  • You need the extra boot for prams, luggage or shopping
  • Rougher roads or flooded streets make ground clearance useful
  • Don't buy it expecting more range than the Dolphin
Worth it for some

BYD Sealion 7 Premium

≈ ฿1,199,900
  • Frequent long trips where charging time matters
  • A family that needs real rear-seat space
  • You value performance and a more premium cabin
  • Budget for higher Class 1 insurance than the other two

What about the Sealion 8?

BYD launched the Sealion 08, a large flagship SUV, in China in early September 2026 and says it will go to global markets. As of late September 2026 we found no confirmed Thai launch date or price. It sits above the Sealion 7 in size and price, so it's not a cheaper alternative. If you need a car in the next few months, don't put your decision on hold for it. We'll update this page when BYD Thailand confirms anything.

FAQ

Is the Sealion 7 worth the extra money over the Atto 3?
Only if you regularly drive long distances or need real rear-seat and boot space. The roughly ฿430,000 extra buys a bigger battery, faster charging, a longer wheelbase and much more power. For mostly city driving, the Atto 3 or Dolphin does the daily job for far less.
Is the Dolphin big enough for a family?
For a couple or a family with one or two younger children, usually yes. Rear legroom is similar to the Atto 3's. The Dolphin's limits are boot space and fitting three older passengers across the back.
Do these prices include the EV3.5 subsidy?
Normally yes. The EV3.5 support is already built into the advertised Thai retail price, so don't subtract it again. See our Thailand EV incentives guide for how the scheme works.
Do I need a home charger?
Not strictly, but home charging is by far the cheapest way to run any of these cars. Current BYD campaigns include a wall charger and installation on most trims. Check that your quotation says so in writing.
Compare running costs Thailand EV incentives
Disclaimer: Prices, campaigns and specifications change frequently in Thailand, sometimes mid-month, and differ between dealers. Figures here are advertised prices, not quotations. Verify with an authorised BYD Thailand dealer (Rever Automotive) before purchasing. For subsidy and tax rules, check with the Excise Department and the Board of Investment (BOI).

Last updated: September 26, 2026

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