Performance, power and 0-100 km/h
2026 Kia EV6 Long Range RWD has the quicker recorded 0-100 km/h time at 7.3 seconds, compared with 7.5 seconds for 2025 GMC Terrain AT4. 2025 GMC Terrain AT4 has the higher listed output at 252 hp; 2026 Kia EV6 Long Range RWD is rated at 229 hp, a difference of 23 hp. The torque figures follow 2025 GMC Terrain AT4 at 370 Nm and 2026 Kia EV6 Long Range RWD at 350 Nm. These figures describe straight-line potential only; they do not establish braking performance, ride quality, steering response or durability under repeated hard use.
Range, battery, charging and efficiency
Range and energy-use figures are either not shared by both cars or not directly comparable across these powertrain types.
Dimensions, cargo space and towing
2025 GMC Terrain AT4 provides the larger quoted cargo volume: 648 litres versus 480 litres, a difference of 168 litres. 2026 Kia EV6 Long Range RWD carries the higher towing rating at 1,600 kg, while 2025 GMC Terrain AT4 is listed at 1,588 kg. 2026 Kia EV6 Long Range RWD is 37 mm longer overall. Exterior size is not a benefit by itself: a longer body may create useful room, but cargo shape, rear-seat space and ease of parking still require a physical inspection.
Price and overall assessment
2025 GMC Terrain AT4 has the lower listed starting price at $38,400, compared with $43,100 for 2026 Kia EV6 Long Range RWD. 2025 GMC Terrain AT4 leads in more of the shared headline fields, but that is not a universal verdict: a buyer should weight price, performance, range and utility rather than simply count category wins. The assessment is based on the specifications shown here; it is not presented as a two-car road test.