BYD Sealion 7 vs Hyundai Ioniq 5: Mid-Size Electric SUV Comparison

The BYD Sealion 7 and Hyundai Ioniq 5 target the same mid-size electric SUV buyer from opposite directions. The Sealion 7 offers a larger battery, more standard equipment, and a substantially lower price, starting roughly $20,000 below the Ioniq 5. The Ioniq 5 counters with an 800-volt architecture that charges from 10 to 80 percent in under 20 minutes, a longer claimed range, a roomier cabin, and a longer vehicle warranty. If you charge at home, the Sealion 7 is the better value. If you regularly use fast chargers on long trips, the Ioniq 5 earns its premium.

Quick-Stats Comparison

Measurement	BYD Sealion 7	Hyundai Ioniq 5
Battery	82.56 kWh LFP Blade	84 kWh (80 kWh usable)
Range (WLTP)	456 to 482 km	495 to 570 km
Architecture	400 volt	800 volt
Peak DC charging	150 kW	233 kW
AC charging	11 kW	11 kW
Length	4,830 mm	4,655 to 4,715 mm
Wheelbase	2,930 mm	3,000 mm
Power	230 kW RWD / 390 kW AWD	168 kW RWD / 239 kW AWD
Top speed	215 km/h	185 km/h
Vehicle warranty	6 years / 150,000 km	7 years / unlimited km
Battery warranty	8 years / 160,000 km	8 years / 160,000 km
Starting price	About $54,990	About $76,200

Design and Dimensions

These two look nothing alike, and that is the point. The Sealion 7 is a coupe-styled SUV with a sloping roofline and BYD's rounded Ocean design language, giving it a sleek, contemporary profile.

The Ioniq 5 takes a neo-retro approach, with pixel lighting, sharp creases, and a shape closer to an oversized hatchback than a traditional SUV. It divides opinion far more, which many buyers consider a feature rather than a flaw.

On dimensions, the Sealion 7 is the longer car at 4,830 mm, verified in BYD's own handbook. The Ioniq 5 is shorter overall but carries a longer 3,000 mm wheelbase, which pays dividends inside.

Interior Space and Practicality

The Ioniq 5's longer wheelbase translates directly into cabin room. Rear legroom is exceptional for the class, and the flat floor plus sliding rear bench make it genuinely versatile.

Boot space favours the Hyundai too, at roughly 527 litres against about 500 litres in the BYD. Both offer a front boot for cable storage, though the Sealion 7's is the larger of the two.

• Ioniq 5 advantage: More rear legroom, a larger boot, and a more adjustable rear bench
• Sealion 7 advantage: A bigger frunk and a longer body for a lower price
• Both: Five seats, flat floors, and Vehicle-to-Load for powering appliances

If you regularly carry adults in the back or load the boot to the roof, the Hyundai is the more practical shape.

Battery and Real-World Range

The Sealion 7 uses BYD's own lithium iron phosphate Blade Battery, rated in the owner's handbook at 150 Ah and marketed as 82.56 kWh. The Ioniq 5 uses an 84 kWh pack with about 80 kWh usable, built on nickel-based chemistry.

The chemistry difference matters more than the capacity gap. LFP tolerates daily charging to 100 percent without the degradation concerns of nickel-based packs, so the Sealion 7's full capacity is genuinely usable every day. Our explainer on why the Blade Battery lets you charge to full every night covers that chemistry in plain terms.

• Sealion 7 Premium: 482 km WLTP, with the handbook quoting 19.9 kWh/100 km on the WLTP cycle
• Sealion 7 Performance: 456 km WLTP, at 21.4 kWh/100 km
• Ioniq 5 base: 570 km WLTP, dropping to 530 km on the Elite and 495 km on the Premium N Line

Independent road tests report the Ioniq 5 consistently meeting its claim, with consumption between 13.5 and 15 kWh/100 km. The Sealion 7 trails on efficiency, which is where the range gap really originates rather than in battery size.

Charging: 800 Volt vs 400 Volt

This is the Ioniq 5's clearest technical win. Its E-GMP platform runs an 800-volt architecture, while the Sealion 7 uses a conventional 400-volt system.

• Ioniq 5: Peaks at 233 kW, completing 10 to 80 percent in roughly 18 to 20 minutes
• Sealion 7: Peaks at 150 kW, taking roughly 40 to 45 minutes for the same 10 to 80 percent
• At home: Both accept 11 kW AC, so an overnight charge is effectively identical

That 20-minute gap only exists at public fast chargers. Since the large majority of Australian owners charge overnight at home, most people will never encounter it. For those who do road trip regularly, it is a real and repeated cost in time. If you want to get the most from the BYD's charging, our practical guide on getting the fastest possible charge from your Sealion 7 walks through the settings and conditions that matter.

Performance and Driving Feel

On raw numbers the BYD wins comfortably. The handbook confirms a 230 kW peak rear motor on the rear-drive car, and the all-wheel-drive version adds a 160 kW front motor for a combined output around 390 kW.

The Ioniq 5 offers 168 kW in rear-drive form and 239 kW as an all-wheel drive, with a 185 km/h top speed against the BYD's 215 km/h.

Driving feel is a different story. Reviewers consistently praise the Ioniq 5's ride quality, natural steering, well-tuned regenerative braking with paddle adjustment, and true one-pedal driving. The Sealion 7 handles competently but is firmer, noisier at speed, and its regenerative braking is less progressive. Choosing between the two grades of BYD is its own decision, which our breakdown of whether the Performance is worth the extra spend over the Premium unpacks in detail.

ADAS and Safety Systems

Both cars carry a five-star ANCAP rating and comprehensive driver assistance, but their execution differs.

Hyundai's SmartSense suite includes Forward Collision-avoidance Assist, Highway Driving Assist 2, and Remote Smart Parking Assist. It is polished, though some systems rearm at every start and need switching off again, a common criticism of Korean EVs.

BYD's DiPilot suite covers adaptive cruise, lane keeping, and blind-spot monitoring competently. Its lane-keeping interventions can feel more insistent than the Hyundai's. Both cars' ratings and test details are published by ANCAP Safety Ratings, worth checking against your specific build.

Infotainment and Connectivity

The Ioniq 5's twin 12.3-inch screens are logically laid out and retain physical shortcut buttons, which reviewers value highly. It supports wireless Apple CarPlay and Android Auto, plus Bluelink connected services and over-the-air updates.

The Sealion 7 counters with BYD's signature rotating central touchscreen, a genuinely useful party trick, plus a strong standard feature list. Its software polish and update cadence trail Hyundai's, which is a consistent theme in reviews.

The full standard specification for each Ioniq 5 trim is listed on Hyundai Australia's official Ioniq 5 page.

Price, Warranty and Value

Price is where this comparison is decided for most buyers.

• Sealion 7 Premium: From about $54,990, with the Performance at about $63,990
• Ioniq 5: From about $76,200 list, rising to $115,000 for the flagship N
• Warranty: BYD covers 6 years or 150,000 km, Hyundai 7 years unlimited kilometres, though that drops to 5 years if you service outside the dealer network
• Battery warranty: Identical at 8 years or 160,000 km

The Sealion 7 undercuts the Ioniq 5 by roughly $20,000 while offering a similar battery size and more power. Running costs for both can be compared using the Australian Government's Green Vehicle Guide.

Common Mistakes

• Fixating on peak charging speed: If you charge at home overnight, the 800-volt advantage rarely applies to you
• Comparing battery size to range: The Ioniq 5's longer range comes from efficiency, not a bigger battery
• Applying the 20 to 80 percent rule to the BYD: Its LFP Blade Battery is designed to be charged to 100 percent daily
• Assuming the longer car is roomier: The Sealion 7 is longer, but the Ioniq 5's wheelbase gives more cabin space
• Overlooking the Hyundai's warranty condition: Its seven-year cover requires servicing within the dealer network
• Ignoring on-road costs: Drive-away pricing varies by state and can narrow or widen the gap

The Verdict

Ask yourself one question first: where will you actually charge?

Choose the BYD Sealion 7 if you charge at home, want the most equipment and power for your money, value an LFP battery you can fill to 100 percent nightly, and can accept slower public charging and a firmer ride.

Choose the Hyundai Ioniq 5 if you road trip often and want 20-minute top-ups, prioritise cabin space and ride comfort, prefer more polished software, and can justify roughly $20,000 more.

Neither is the outright winner. The Ioniq 5 is the more refined and better-engineered car. The Sealion 7 is the far better value, and for the majority of owners who plug in at home, the practical difference in daily use is small.