Super TestCar reviews - Audi - A6 - S6 sedanAudi modelsEngine3 Aug 2001 S6 uses a version of the 4.2-litre 40-valve (that's not a typo) V8 engine that powers the S8 and A6 4.2 quattro. This little number produces 250kW at 7000rpm (creating a power to weight ratio of 6.9kg per kiloWatt) and 420Nm at 3400rpm, with close to 300Nm available from just above idle speed. The burst from standstill to 100km/h is a claimed 6.7 seconds. Fuel consumption is not a strongpoint, European figures pointing to 21.8 L/100km on the city cycle and 10.1L/100km on the highway. Though based on the 220kW/400Nm A6 4.2, the uprated performance of the S6 was achieved though a range of measures, including a retuned magnesium variable intake manifold with two-stage length adjustment (the longer air intake path enables high torque at low speeds, the shorter one full power at high speeds). Higher-lift and retimed camshafts aim to ensure optimum cylinder filling, with the inlet valve timing matched to the engine's relevant operating point by a hydraulic camshaft actuator. At higher engine speeds an additional vacuum-controlled flap opens in the air cleaner housing and enables the engine to breathe more freely. The revised exhaust system with reduced back pressure has a high gas flow rate and creates a rorty note. Did you know?CO2 emissions for the S6 are a claimed 343g/100kmAll car reviewsAlfa Romeo Abarth Alpine Alpina Audi Aston Martin BMW Bentley Chevrolet Chery Citroen Chrysler Dodge Cupra Ferrari DS Ford Fiat FPV Foton GWM Great Wall Holden Haval HSV Honda Hyundai Hummer Isuzu Infiniti Jeep Jaguar Lamborghini Kia LDV Land Rover Lotus Lexus Maserati Mahindra McLaren Mazda Mercedes-Benz Mercedes-AMG Mini MG Nissan Mitsubishi Peugeot Opel Proton Porsche Renault Ram Rover Rolls-Royce Skoda Saab SsangYong Smart Suzuki Subaru Toyota Tesla Volvo Volkswagen |
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