Question: what is tfsi cylinder on demand?
Answer: The new 4.0 TFSI, a powerful V8 with twin turbochargers, is equipped with “cylinder on demand” technology. When operating at part load, four of its cylinders are deactivated. This reduces fuel consumption by an average of five percent. ... On the new 4.0 TFSI, cylinders are deactivated if the load on the engine is low.