Ferrari technical director James Allison has admitted that the thought of an engine freeze ahead of the 2015 F1 season would have been most frustrating as the Scuderia attempted to close the gap on its Mercedes- and Renault-powered rivals.

Like the French marque, Ferrari was caught on the hop by Mercedes' impressive performance in 2014, and lobbied hard to be able to develop its power unit throughout 2015 in an effort to close the gap. Having its wish granted, Allison concedes, will allow the Prancing Horse a better chance of achieving its aim.

"So, finding ourselves, as we are, recovering performance, trying to eat into the lead demonstrated last year by our opposition, it's good to have the flexibility we will enjoy in 2015 to keep that development programme going during the year, to allow us, if we do a good job, to develop stronger and faster than we would do otherwise," he explained as the covers came off the new SF15-T that the Scuderia hopes will challenge for this year's world title in the hands of Kimi Raikkonen and new recruit Sebastian Vettel.

"When you are coming from a position like we are, of attempting to recover a gap in performance between our car and some of the opposition, it's quite galling to have an idea how you might improve your car but not to be able to do so because the regulations would freeze a certain part of that design for a whole season at a time. It's frustrating to sit there, looking at something on the shelf that you know could deliver you more performance..."

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Obviously, Ferrari won't be alone in having that 'flexibility' in development, but Allison insists that that is all part of the allure of racing in the top flight.

"Of course, that opportunity is open to every team competing next year, but the fun of F1 is that the challenge is not supposed to be easy," he grinned, "But it's nice to have the opportunity to try to bring what we can do to the track and see if we can close that gap."