The Spur continued with the high degree of ride quality and self-leveling suspension from the Shadow, this time using a Girling automatic hydraulic ride height control system and gas-charged shock absorbers. The Silver Spur was a long wheelbase version of the Silver Spirit, produced at the same time. The Spirit was the first car to feature the retractable Spirit of Ecstasy. The spring loaded Mascot sank onto the radiator shell if dislodged from its position.
The Silver Spirit III and Silver Spur III, introduced in 1993, relied on improvements to the traditional V8 engine as their differentiator. A new intake manifold and cylinder heads upped power output, which was still stated simply as "adequate" in company literature. Dual airbags were another new feature, and the rear seats now adjusted independently.
The final revision of the Silver Spirit and Silver Spur was introduced late in 1995, but a new Silver Dawn appeared a year earlier in the American market. Another new name was also added, the Park Ward limousine, just as the Silver Spirit name was abandoned.
As of 1997, the long wheelbase was standard on all models, with the limousine models offering the extra-long only. Another major change that year was the introduction of a Garrett turbocharger on all models.Source: Wikipedia.