Performance, power and 0-100 km/h
2026 Mercedes-Benz AMG C 63 S E Performance has the quicker recorded 0-100 km/h time at 3.4 seconds, compared with 8.4 seconds for 2025 Audi A3 35 TFSI. 2026 Mercedes-Benz AMG C 63 S E Performance has the higher listed output at 680 hp; 2025 Audi A3 35 TFSI is rated at 150 hp, a difference of 530 hp. The torque figures follow 2026 Mercedes-Benz AMG C 63 S E Performance at 1,020 Nm and 2025 Audi A3 35 TFSI at 250 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 Audi A3 35 TFSI provides the larger quoted cargo volume: 380 litres versus 350 litres, a difference of 30 litres. 2026 Mercedes-Benz AMG C 63 S E Performance is 477 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 Audi A3 35 TFSI has the lower listed starting price at $35,400, compared with $87,500 for 2026 Mercedes-Benz AMG C 63 S E Performance. The measured categories split evenly, so the better choice depends on which attributes matter most. The assessment is based on the specifications shown here; it is not presented as a two-car road test.