Performance, power and 0-100 km/h
2026 Mercedes-Benz S-Class S 580 4MATIC has the quicker recorded 0-100 km/h time at 4.4 seconds, compared with 8.5 seconds for 2025 Peugeot 408 1.6 PHEV 180 Allure. 2026 Mercedes-Benz S-Class S 580 4MATIC has the higher listed output at 503 hp; 2025 Peugeot 408 1.6 PHEV 180 Allure is rated at 180 hp, a difference of 323 hp. The torque figures follow 2026 Mercedes-Benz S-Class S 580 4MATIC at 700 Nm and 2025 Peugeot 408 1.6 PHEV 180 Allure at 300 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 Mercedes-Benz S-Class S 580 4MATIC provides the larger quoted cargo volume: 550 litres versus 471 litres, a difference of 79 litres. 2026 Mercedes-Benz S-Class S 580 4MATIC is 602 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 Peugeot 408 1.6 PHEV 180 Allure has the lower listed starting price at $39,500, compared with $128,400 for 2026 Mercedes-Benz S-Class S 580 4MATIC. 2026 Mercedes-Benz S-Class S 580 4MATIC 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.