Rollover evaluations

Large luxury cars

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To measure roof strength, a metal plate is pushed against one corner of a vehicle's roof at a constant speed. The maximum force sustained by the roof before 5 inches of crush is compared to the vehicle's weight to find the strength-to-weight ratio. This is a good assessment of vehicle structural protection in rollover crashes.

Each model is rated based on our measured curb weight of a vehicle with typical engine, transmission, and equipment options. However, when the same model is available in a configuration over 10% heavier than the typically equipped vehicle, a separate rating is assigned.

More about how we rate vehicle roof strength

Good Good   Acceptable Acceptable   Marginal Marginal   Poor Poor   |   Vehicles are listed in order of performance


Model Overall rating Curb weight (lb) Peak force (lb) Strength-to-weight ratio
Mercedes E class
2010 models
Good 3,880 20,961 5.40
Hyundai Genesis
2010 models mfg. after Jan. 2010
Good 3,862 19,000 4.92
Volvo S80
2007-10 models
Good 3,756 15,989 4.26
Lincoln MKS
2009-10 models
Good 4,172 17,461 4.19
BMW 5 series
2011 models
Good 3,803 15,364 4.04

©1996-2010, Insurance Institute for Highway Safety, Highway Loss Data Institute
1005 N. Glebe Road, Suite 800, Arlington, VA 22201 USA | tel 703/247-1500 | fax 703/247-1588