Jag to use 'highest-revving Cosworth engine' ever.

The Jaguar Racing team and the new R4 - unveiled today [Tuesday] online, with a "virtual launch" - will benefit from the brand new Cosworth CR-5 V10 engine in 2003.

It is the first time Cosworth has raced with a 90-degree engine layout and the key benefit as opposed to a 72-degree engine is improving the centre of gravity.

As the most successful engine builder in Formula One history, Cosworth Racing will continue to develop the CR-5 V10 engine over the course of the season.

Nick Hayes, Managing Director at Cosworth Racing takes up the engine story: "The reason we've gone to 90 degrees for 2003 is in the interests of improving the centre of gravity (C of G) - and I have to say we've achieved a very significant step for 2003 in terms of lowering the C of G. And not all of that improvement has come about via the wider V angle, either.

"Rob White [chief engineer, Cosworth Racing] and his team have done a fabulous job - a lot of good, clever design - in repositioning various items in order to help lower the C of G, to be honest. But that's normal; every time we design a new engine, we look very hard at the V angle - because, by and large, the wider you make the V angle, the lower you make the centre of gravity; and the lower you make the centre of gravity, the better you make the car's dynamics.

"I'm not going to quote precise figures for CR-5, but I can tell you that it's the highest-revving engine Cosworth Racing has ever built," added Hayes. High rpm is a good thing for the simple reason that it gives you more bangs per minute - which in turn provides more power; more top-end power, that is. But, again, it's a question of compromise - because sky-high rpm figures can have a detrimental effect on reliability.

"There are mechanical limits to components like pistons and connecting rods, too; there's a limit to how fast they can be made to function reliably. And there might be problems with combustion. Valve gear, too. So, as I say, it's a compromise."