Williams launch the FW28

The FW28 will be powered by a Cosworth engine after Williams ended their partnership with BMW last season.

The new car features a completely revised suspension to help adjust to Bridgestone tyres after Williams switched to the Japanese manufacturer this year.

It also features an aggressive barbed sting on the back of the engine cover.

The new car progresses the cascaded front wing that the team used in the final two races of 2005.

Williams technical director Sam Michael said the expectations on the new car are high.

"The FW28 has a lot resting on its shoulders and it must re-establish Williams at the sharp end," said Michael. "There are many good teams in Formula One now and how to beat them is simple - design a faster car.

"The FW28 has been a large departure from previous Williams' designs due in part to new aerodynamic efficiency targets, but also the mechanical challenges of changing to Bridgestone tyres and Cosworth's V8 engine. It has been a really interesting car to design and I believe that will continue to be the case during its development in 2006."

Williams co-founder Patrick Head added: "I'm expecting it to make a difference. I am expecting to win races."

The car will test for the first time at the Valencia circuit on January 31.