- Turkish Grand Prix
Barrichello and di Grassi unhappy with Cosworth engine
Both Rubens Barrichello and Lucas di Grassi have complained about a lack of power from their Cosworth engines.
Barrichello qualified just 15th while di Grassi in the revised Virgin chassis will start Sunday's race from the back row of the grid behind one of the HRTs. There have been a number of reports that the Cosworth V8's power output diminishes with the life of the engine and at Istanbul Park Barrichello said the unit in the back of his Williams is "suffering".
"The engine that we brought did not work," he added. "The straightline speed is not good."
Meanwhile, di Grassi reported: "The car was good in the corners, but the engine was not working on the straights or in acceleration."
Di Grassi will have a fresh engine fitted for Sunday's race.