As back-to-back world champions Red Bull unveil their 2012 contender, Adrian Newey explains the thinking behind the car.

Does recent success add to the pressure to maintain it or lessen it, as you have continuity?
The last few years have been really good, really successful; it's been an incredible journey to get there. It's the fourth evolution of the RB5 this year, so obviously the pressure is to try and stay there if we possibly can. It's a difficult task, we have lost the exhaust technology with the restriction exhaust outlet position that we were able to develop and perhaps be ahead of the pack on in the last couple of years, that led to a big re think over the winter. Whether that will affect us more than other people is difficult to know of course. We designed the RB7, last year's car, around that exhaust position and were probably the only people to do so, so it may be that we've lost more than other people through that. Only time will tell, it will be good to get out to do some testing and to see where we get to.

Do you find that frustrating or more of a challenge?
Regulation restrictions like the lost exhaust are a bit frustrating in truth, because they are exactly that, they are restrictions, they're not giving new opportunities or revenues particularly, they're just closing a door. Regulation changes I enjoy, regulation restrictions I rather lament.

How have you coped with the removal of the exhaust blown diffuser for RB8?
RB7 was designed around the exhaust, this year knowing that the exhaust position from last year would be taken away, we've had to go back and look at how we developed the car through the last one and two years with the side exit exhaust and try and, if you like, make sure that the routes we had taken that were only suitable for that exhaust position we now had to re-evaluate. Probably one of the key things there is the rear ride height. The exhaust allowed us to run a high rear ride height, it's much more difficult without that to sustain a high rear height so we have to go back down and have to redevelop the car around that lower ride height.

The other major change is the height of the nose. Did that present difficulties?
The restriction nose height which is a maximum height just in front of the front bulkhead hasn't really changed the chassis shape very much. We've kept more or less the same chassis shape, but had to drop the nose just in front of the front bulkhead, which, in common with many other teams, has led us to I think I'd probably say a slightly ugly looking nose. We've tried to style it as best we can, but it's not a feature you would choose to put in were it not for the regulation.

Would you say RB8 is still an evolution of RB7 or did you have to rethink many aspects?
I'd say RB8 is the fourth generation of what started with the 2009 car, the RB5. So I guess this is the great grandson of that car.