Ingoldstadt, Germany – Audi has introduced its fuel-saving technology at the Paris Auto Show with the unveiling of the A4 TDI “concept e”. The model uses innovative efficiency modules to achieve a fuel economy rating of 3.9 L/100 km.

The TDI concept e uses a direct-injection TDI engine with an output of 120 horsepower and 214 lb-ft of torque with numerous technologies, include soft springs on the intake valves, a new thermal management system, a recuperative system that stores power when braking and coasting to a stop and stores it in a battery, a start-stop system that switches the engine off when the vehicle is at a standstill, and magnesium parts to reduce the weight of the six-speed transmission, with an insulating cover for faster warm-up and modified gear ratios.

The concept e also includes an electromagnetic servo assembly for steering, electrically-actuated rear brakes, and tires optimized for road resistance. The driver also has access to an economy training program and a navigation system that calculates the most fuel-efficient route to a destination.

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