would prove better for both Rosberg and Williams. The Finn had a new teammate in Nigel Mansell and the all carbon fibre Williams FW10 chassis was a big improvement over the FW09B. For the first few races the team used the 1984 engines until Honda introduced an upgraded version which improved power delivery, fuel economy and most importantly, reliability. Rosberg used the new engine to good effect, winning the Detroit Grand Prix and claiming pole in the next two races in France at the Paul Ricard Circuit and the British Grand Prix at Silverstone. Rosberg's pole-winning lap at Silverstone created history when he lapped the 4.719 km (2.932 mi) circuit in 1:05.591 for an average speed of 259.01 km/h (160.94 mph). This would remain the single fastest lap of a circuit in Formula One until broken by Williams driver Juan Pablo Montoya at the 2002 Italian Grand Prix at Monza.