September 22, 2005 Formula One is set for a major shake-up next year when the three-litre V10 engines of the last decade will be replaced by 2.4 litre V8 engines and the technological prowess of Renault, Mercedes, BMW, Cosworth, Ferrari and Honda will be tested to the max in the most expensive, ongoing, combatitive sport man has ever known. On Tuesday and Wednesday at the Silverstone GP circuit in the UK, the 2006 season Mercedes-Benz Formula One engine was tested on the race track for the first time. Pedro de la Rosa was at the wheel of the interim Team McLaren Mercedes MP4-20B, a modified version of the 2005 race car which has been adjusted to fit the new engine. Pedro completed 38 laps on Tuesday and 40 laps on Wednesday and achieved a best time of 1:22.974. Champion-elect Fernando Alonso in a Renault with V10 engine posted the fastest lap of the test with a 1:17.018.