Lewis Hamilton and Red Bull's top brass all believe Ferrari's power unit now has the upper hand over Mercedes, with Renault still slightly behind its rivals. Despite this year's increased reliability demands, Ferrari's efforts to boost the power and efficiency of its engine have been fruitful. Last winter, under the guidance of the Scuderia's engine technical chief Corrado Iotti, work was centered on increasing output but also on improving performance at slow and medium speeds where bigger gains were possible. "They have a super engine," Red Bull's Christian Horner said of Ferrari's unit. "Our chassis is probably the best of the top three cars, but we couldn't get past them....
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