Red Bull designer Adrian Newey reckons next year's changes will add 'spice' to the 2014 F1 season.

The sport will adopt new 1.6-litre turbo-charged engines next season, while teams will also make greater use of energy recovery systems as F1 looks to improve its green credentials. There are also other revisions - to things like aerodynamics - meaning there is potential for the rest of the pack to end Red Bull's run of success. Newey admits that there is uncertainty over who will get it right - especially on the engine front.

"The aerodynamic changes are big, but they are smaller than the changes we had in 2009. So yes, there is the chance that one team comes up with a car that is better than their rivals', but on top of that you have the engine changes and what is absolutely unclear is whether one engine manufacturer will be able to come up with a significant advantage," Newey said in an interview with the official F1 site.

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"But the car that will brush aside all others will be a car having the combination of good engine and good chassis - if one side is letting you down you will have a problem.

"But who will come up with the ideal combination? That's the big guessing game for all of us and will add spice to the 2014 season."

Asked how the teams go about designing a car for the new rules and if they do start with a blank piece of paper, he replied: "The first thing that you do is to read the regulations - very, very carefully. You try to read what they actually say, rather than what they intend to say, as this is not always the same thing," he emphasised.

"After that I'm actually breaking it down into bite-size chunks. Then you try to understand from the regulations the aerodynamic and mechanical packaging that appears to be the best solutions for those different areas.

"You go away and research them and at some point try to bring it all back together again. For me that is the important bit: the end product should be a whole and not pieces thrown together into one cluster."

Pressed on how much room there is for interpretation with the rules these days, Newey added that it is getting less and less.

"The F-duct was a very clever example of getting around regulations; the exhaust duct was a good way of getting around them; little bits and pieces where we've found small loopholes in the regulations. But it is increasingly getting smaller," he continued.

"To have been an engineer in the seventies - the early seventies - would have been fascinating for me. You had almost no regulations, but on the other hand you also had very little research capabilities. You came up with a car, ran it, and if you were lucky it was a good idea and it ran well. If not, then you ran the previous year's car and hoped for next year," he concluded.