The Peugeot 504 XS, a model from 1994, was primarily available in Europe. The top speed of a specific car can vary depending on factors such as engine condition, transmission, and any modifications made to the vehicle. However, the standard top speed for the Peugeot 504 XS from 1994 is approximately 185 kilometers per hour (115 miles per hour). Please note that this is an approximation and individual cars may have slightly different performance characteristics.