Information from Google:

Honda included four-wheel steering (4WS) in the Prelude in 1987, making it the first car to have a steering angle sensing 4WS system. The 4WS system is a mechanical system that steers the front and rear wheels in the same direction (in phase) or opposite directions (reverse phase) depending on the steering angle. The 1988 Honda Prelude Si's 4WS system steers the rear wheels in the same direction as the fronts when the steering wheel is turned less than 246 degrees. The maximum same-direction steering angle is 1.5 degrees, and the maximum counter-steering angle is 5.3 degrees.

The 4WS system is designed to improve maneuverability and handling. Reviews note that it improves low-speed maneuverability and creates tighter turning circles, but it also requires more effort than the 2WS Prelude. The 4WS system adds 28 pounds to the Prelude's curb weight and $1,300 to its price.

The 4WS system was available on the Prelude until the fifth and final generation went off sale in the early 2000s.