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Audi's stop-start now an automatic

Date: 02 November 2009

Audi is adding its stop-start system to an automatic transmission for the first time.

Already launched in manual A3, A4 and A5 models with both petrol and diesel engines, the automatic stop-start system will be available with the lower medium A3's S-tronic transmission in conjunction with the 1.4 TSFI petrol and 1.6 TDI diesel engines.

The development, claimed to be worth around 5g/km, takes the diesel engine to 109g/km, below the capital allowance threshold, and to an average 67.3mpg. The engine cuts out when the car is at a standstill with the brake pedal depressed, firing again in 0.2 seconds as the pedal is released.