The 2.9L/100km figure equates to a 21.28 per cent improvement over the Fiesta's already industry-leading official fuel economy number of only 3.7L/100km.
Ford's other team entrant, the Falcon XR6 Turbo, also continued to showcase just how easily outstanding fuel economy can be matched to outstanding performance. Day Four of the Challenge saw the Falcon achieve a 6.7L/100km result – a staggering 42.33 per cent improvement over its official (combined) ADR fuel number.
The Falcon's cumulative number is just as impressive – recording only 6.9L/100km over the course of the entire trip so far.
"The drive from Alice Springs to Cooper Pedy was the longest of the entire Green Challenge," said Ford Team Manager Justin Lacy. "A new mandatory rest period was appreciated by the Ford teams – particularly as it proved not to have any negative effect on the fuel economy numbers that either the ECOnetic or the XR6 Turbo achieved during the day."
Official figures for Day Five from Cooper Pedy to Port Augusta will be available later today.
With: Ford Australia