Simply. Faster.
For the P5 Cervélo focused entirely on aero performance—within the boxes defined by the UCI, anyway. Cervélo applied years of experience in engineering the fastest aero bikes and real-world testing with their pro athletes. The result is a bike that pushes the boundaries in every way possible. They spent hours in CFD, FEA, and ISO testing and the reviews came back from their athletes: BRB.