It is the cost to repair these cars once damaged is the problem. Also 997s is quite new at present where as the 996TT has been around for 5 years.
Read this
1. Damage and Parts Costs: The likely extent of damage to each car model and the cost of the parts involved in its repair. The lower these costs, the more likelihood there is of a lower group rating.
2. Repair Times: Longer repair times mean higher costs and the greater likelihood of a higher group rating. Different paint finishes on modern vehicles are an important factor. These too are taken into account.
3. Value: The prices of new cars identify the higher specification models within a model range.
4. Body Shells: The availability of body shells (the basic frame of the vehicle) is taken into account in
Insurance group ratings because they are essential for certain accidental damage repairs.
5. Performance: Acceleration and top speed are important factors.
Insurance companies know very well, from their claims statistics, that high performance cars often result in more frequent
Insurance claims.
6. Security: Security features fitted as standard equipment by motor manufacturers can help to reduce car
Insurance claims costs. Such features include high security door locks, alarm/immobilisation systems, glass etching, coded audio equipment, locking devices for alloy wheels and visible VIN numbers.
Got this from
http://www.expertcardirectory.co.uk/car-insurance-groups.htm
Migration info. Legacy thread was 26395
