Concours d Elegance is a term denoting a gathering together of automobiles for judging their relative merits in terms of coachwork, design, finish, and appointments.  Over the years the PCA Concours has been divided into 4 groups.  Restoration, Preservation, Preparation and Wash and Shine.
PCA members may enter their Porsches in either the Restoration Group or the Preservation Group provided the automobiles are at least ten model years old.  Preserved Porsches have the opportunity to have their cars compete as a separate group.  Restored Porsches compete as a group.  Newer cars compete in the Preparation Group.  Also, if you would like to show your Porsche in a less competitive way, PCA now offers a Wash and Shine Group.
The grouping “Restoration” implies that the entered Porsche has been repainted, reupholstered, re-carpeted, trim re-plated, with non service items such as rubber seals and trim replaced in a comprehensive manner. The paint color need not be the original color.  The upholstery need not be the original color or fabric.  The engine and or the transaxle  may have been upgraded or replaced entirely.  
For “Preservation”, the emphasis is on the preservation of the car.  The Porsche is maintained in its original condition with evidence that the car has been reasonably used and not simply stored.  The Paint color must be original along with the carpet and upholstery must be of original color and fabric.  The engine and transaxle must be original as well.  The Kardex “build Sheet” is required for the judges to review.
For the ‘Preparation Group”, emphasis is on preparation, presentation and cleanliness.  Originality will not be judged.  The Kardex is not required.    This group is broken down into two classes, “Full” and “Touring”.  Full is just what it implies, the entire car is judged, including the underside of the car.  Touring, is everything but the underside of the car.
Porsche recently has added a Wash and Shine Group, for those who want to dip their toes in the  Concour experience.  Focus is on the exterior of the car, Cleanliness, Paint, along with  Body panel fit and finish.
Each car will be inspected by a team of Judges.  The Judges will be timed.  The following components will be judged :  Exterior, Interior, Engine, Storage, Chassis.