Porsche

Porsches interpretation of efficiency is a system that works only when it is needed, and then does so in a particularly effective way. Whereas a conventional hydraulically assisted steering system draws engine power continuously, the electric motor of the electromechanical system in the Cayman models uses energy only when you actually steer.  Rear-axle steering is electromechanical adjustment system at each rear wheel enable the steering angle to be adapted based on the current driving situation, steering input and vehicle speed. The avantage for day to day driving: during low-speed maneuvers, the system steers the rear wheels in the opposite direction to that of the dront wheels. This has the virtual effect of shortening the wheelbase.