Performance, power and 0-100 km/h
2026 Audi A6 e-tron S6 e-tron has the quicker recorded 0-100 km/h time at 3.9 seconds, compared with 7.5 seconds for 2025 Nissan Altima SR 2.5L. 2026 Audi A6 e-tron S6 e-tron has the higher listed output at 551 hp; 2025 Nissan Altima SR 2.5L is rated at 188 hp, a difference of 363 hp. The torque figures follow 2026 Audi A6 e-tron S6 e-tron at 855 Nm and 2025 Nissan Altima SR 2.5L at 244 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
2026 Audi A6 e-tron S6 e-tron provides the larger quoted cargo volume: 502 litres versus 436 litres, a difference of 66 litres. 2026 Audi A6 e-tron S6 e-tron is 58 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 Nissan Altima SR 2.5L has the lower listed starting price at $29,890, compared with $89,900 for 2026 Audi A6 e-tron S6 e-tron. 2026 Audi A6 e-tron S6 e-tron 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.