BYD Sealion 7 Premium vs Hyundai IONIQ 5 84 kWh RWD: which Australian family EV fits?

On the exact rear-drive variants, Hyundai's IONIQ 5 is the stronger choice if your family needs an approved heavy trailer rating, more official-cycle range or predictable rapid-charge stops. The Sealion 7 Premium is the current Australian sales and search hot model, with substantially more motor power, a longer body and a current cashback promotion. Neither a laboratory range lead nor a promotional headline is a complete buying decision. Ask for fresh written cash drive-away quotes in the same postcode, check the VIN's tow approval, sit in both rear rows and try your own child seats and luggage before paying a deposit. Our verdict is conditional because we have not road-tested this pair or obtained matched transaction prices.

BYD's earlier A$54,990 drive-away Sealion 7 promotion ran only to 30 September 2026 and must not be treated as today's national price. Its current 1 October to 21 December offer gives eligible Premium orders A$4,000 cashback if delivered by 31 December, subject to terms; the separate novated-lease discount cannot be stacked with it. One NSW Hyundai dealer advertises a base 84 kWh RWD IONIQ 5 for A$70,990 drive-away on eligible no-options stock from 1 October to 31 December. This is a dealer-specific cash basis, not Hyundai's national transaction price. Ask both local dealers on the same day for the exact colour, delivery, registration, accessories, finance and trade-in terms. Compare cash against cash, or finance against finance, and obtain a fresh quote if delivery misses the promotion deadline.

The Australian manufacturer sheets put these rear-drive variants on the same WLTP combined cycle: 482 km for the Sealion 7 Premium and 570 km for the IONIQ 5 84 kWh on 19-inch wheels. The 88 km laboratory gap is useful for planning but is not a guaranteed motorway or winter gap. BYD also publishes a larger NEDC number for its car; do not compare that with Hyundai's WLTP result. Hyundai estimates about 18 minutes from 10 to 80 percent at compatible 350 kW charging equipment, while also showing about 76 minutes at 50 kW. The 350 kW number describes the charger class, not the vehicle's sustained intake. BYD specifies 150 kW peak DC but its Australian sheet does not provide a matched 10 to 80 percent time. Battery temperature, state of charge, queueing and the particular plug govern real stops. AC figures are 11 kW BYD and 10.5 kW Hyundai; household installations may deliver less.

The BYD is 4,830 mm long and 1,925 mm wide; the Hyundai is 4,655 mm long and 1,890 mm wide. Thus the IONIQ 5 saves 175 mm in length and 35 mm in body width, while its 3,000 mm wheelbase exceeds BYD's 2,930 mm by 70 mm. Neither number proves which rear bench better fits three child seats. BYD specifies a 500 L rear boot and 58 L front space, while Hyundai specifies 520 L and 57 L. A 20 L difference may disappear when a stroller's shape meets the hatch aperture: physically load your own kit. Hyundai officially rates this 84 kWh RWD variant at 1,600 kg braked, 750 kg unbraked and 100 kg towball. Australian independent data suggest 750 kg for the Sealion 7, but BYD's cited Australian brochure omits the figure; obtain written VIN-specific manufacturer/dealer approval before planning any trailer. Check payload, towbar and licence as well.

BYD quotes 230 kW, 380 Nm and a 6.7-second zero-to-100 km/h time for the Premium rear-drive car. Hyundai lists 168 kW and 350 Nm for its base 84 kWh rear-drive IONIQ 5. That makes BYD's official peak motor rating 62 kW higher, but it does not establish better ride comfort, braking, driver-assistance calibration or tyre wear. Both are family cars whose seating and controls deserve a test drive. Compare the actual delivery cars for seat trim, heat and ventilation, infotainment language, connected-service terms, driver-monitoring behaviour, tyre size and spare-wheel solution. Model-page marketing often describes upper grades, so make the salesperson mark every promised item against the quoted exact grade. Record any accessory and subscription costs in the final written offer.

Neither a WLTP range figure nor a promotional price proves the cheaper car to own. Estimate annual kilometres, home and public charging shares, actual electricity tariffs, charger installation, insurance premiums for your drivers, tyres, scheduled servicing, registration and future resale. Hyundai quotes 16.04 kWh per 100 km on the WLTP cycle for the 84 kWh RWD 19-inch car; this is laboratory consumption, not your power bill. We have no matched Australian real-world test, insurance quotes or depreciation forecast for these exact variants. A family relying on paid highway rapid charging may value the Hyundai's official charging proposition more than a family charging overnight. For either car, request the detailed service schedule and a demonstrable local repair route, then rerun the cost model with your own inputs.

September 2026 Australian registration coverage reports 2,687 Sealion 7 registrations, placing it near the front of the published electric model table. A separate Google Keyword Planner study collected in May 2026 identifies the Sealion 7 as Australia's most searched electric model over its April 2025 to April 2026 observation window; Australian coverage reports 874,500 estimated model searches. This is dated, third-party model demand rather than October pair volume. Local comparison pages for Sealion 7 and IONIQ 5 show this buyer question exists here. Our own Australian Search Console export for 27 September to 24 October returned no Sealion 7 query rows, which describes this site's observed query sample, not national interest. The local Chinese-marque Top 10 inferred from one published top-20 registration table remains provisional, not an official exhaustive ranking.

Research was checked on 27 October 2026 for Australian versions only. The range numbers share the WLTP combined cycle, while the DC specifications lack a matched BYD 10 to 80 percent time in the cited Australian sheet. We did not turn the old BYD September drive-away campaign, a used-like demonstrator listing or a third-party postcode estimate into a current new-car cash price. We have not obtained two same-postcode dealer quotes, a VIN-specific BYD tow approval, matching measured highway consumption or a controlled charging test. The ANCAP stars come from different assessment years. Current exact pair production inventory was checked before writing this new URL; existing Sealion 7 guides cover other competitors. These limitations belong in the buying decision: insist on written transaction and towing terms and compare the cars in person.