Manufacturers often have very different approaches to such basic issues as vehicle durability, stability, economy, luxury, etc. Take two examples: ... The a#39;99 Porsche 911 that goes on sale sometime in 1998 breaks with tradition by using a liquid cooled engine. Ita#39;s new in other ... The Prizm and its Toyota Corolla near- twin are greatly improved and sport side airbags, a first in the compact economy class.