The 2026 Kia K4 has officially launched in Australia, expanding its lineup to include a hatchback variant alongside an updated base engine. Arriving in dealerships this month, the new model represents a significant evolution from the previously available sedan-only option, which replaced the Cerato in early 2025. Prices for the K4 have seen an increase of between $800 and $1,500 compared to the previous model.
This latest iteration replaces the former 2.0-litre ‘MPI’ four-cylinder petrol engine with a more efficient Atkinson-cycle 2.0-litre engine. The transition to Kia’s Intelligent Variable Transmission, which is a continuously variable transmission, contributes to a notable improvement in fuel efficiency. The 2026 K4 sedan achieves a combined fuel consumption of 6.0L/100km, a significant drop from the 7.4L/100km of the earlier model, and reduces emissions from 167g/km to 139g/km.
Despite these improvements, the new engine configuration results in a slight decrease in power, with output reduced by 2kW to 110kW and torque down by 12Nm to 180Nm. The peak torque is now reached at a higher 4,500rpm, compared to 4,000rpm in the previous version. The flagship GT-Line continues to feature the unchanged turbocharged 1.6-litre four-cylinder engine paired with an eight-speed automatic transmission.
Hatchback Variant and Features
The introduction of the hatchback body style is a strategic move for the K4, as hatchbacks are increasingly seen as essential in the small car segment. The K4 hatch shares the same 2720mm wheelbase as the sedan but is 270mm shorter overall. All existing variants will be available in this new body style, maintaining consistent pricing across both hatch and sedan options.
As for the hybrid version of the K4, details remain scarce. It has been confirmed for future release in Europe and is expected to utilize a 1.6-litre hybrid system similar to that found in the Hyundai i30 Sedan and Kona hybrids, generating 104kW and 265Nm.
The K4 is built with a torsion-beam rear axle for most variants, while the GT-Line benefits from a multi-link independent rear suspension, enhancing driving dynamics. Kia supports the K4 with a seven-year, unlimited-kilometre warranty, although capped-price servicing information for model year 2026 has yet to be announced.
Safety Ratings and Equipment
The safety credentials of the K4 sedan have been validated by the Australian New Car Assessment Program (ANCAP), with dual ratings based on testing conducted in 2025. The K4 S model without the optional Safety Pack achieved a four-star rating, while all other sedan variants received five stars. The K4 Hatch awaits assessment.
Standard safety features across the K4 lineup include advanced driver assistance systems. The K4 S equipped with the Safety Pack includes an upgraded Forward Collision-Avoidance (FCA) system that supports junction crossing and oncoming lane change detection. Higher variants like the Sport and above come with Kia’s Highway Driving Assist 2, which combines adaptive cruise control and lane-keeping assistance.
Interior options vary by trim, with the S, Sport, and Sport+ featuring a Medium Grey finish, while the GT-Line offers an Onyx Black cabin with white accents. The standard exterior color is Clear White, with additional colors available for an extra $600.
The launch of the 2026 Kia K4 marks a significant step for Kia in the competitive small car market, combining efficiency, safety, and design in both sedan and hatchback formats.
