Performance, power and 0-100 km/h
2025 Alfa Romeo Tonale PHEV Q4 has the quicker recorded 0-100 km/h time at 6.2 seconds, compared with 7.5 seconds for 2025 GMC Terrain AT4. 2025 Alfa Romeo Tonale PHEV Q4 has the higher listed output at 280 hp; 2025 GMC Terrain AT4 is rated at 252 hp, a difference of 28 hp. The torque figures follow 2025 Alfa Romeo Tonale PHEV Q4 at 520 Nm and 2025 GMC Terrain AT4 at 370 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 422 litres, a difference of 226 litres. 2025 GMC Terrain AT4 carries the higher towing rating at 1,588 kg, while 2025 Alfa Romeo Tonale PHEV Q4 is listed at 1,200 kg. 2025 GMC Terrain AT4 is 130 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 $43,500 for 2025 Alfa Romeo Tonale PHEV Q4. 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.