article thumbnail

Downsized 4.0 TFSI for Audi S8 cuts fuel consumption 23% compared to predecessor; cylinder deactivation and start-stop

Green Car Congress

Audi’s principle of downsizing: “ Forced induction replaces displacement ” One twin-scroll turbocharger per cylinder bank compresses the fresh air. The result is powerful torque build-up at an early stage when accelerating from idle speed. Even at 1,000 rpm, the 4.0

Audi 199
article thumbnail

Opel presents new 1.0 SIDI Turbo engine at Aachen Colloquium; below 100 gCO2/km and ~59 mpg in the Adam

Green Car Congress

liter class which are engineered to meet customer demand for strong, downsized engine performance. Water-cooling of the exhaust reduces temperatures for improved emissions control, while also reducing heat build-up around the turbine. All vehicle applications of the 1.0 liters displacement.

Engine 220