The new RDX performed particularly well in the Institute's rigorous roof strength test.

The Insurance Institute of Highway Safety announced today that the redesigned 2013 Acura RDX has aced its bevy of crash tests and earned its Top Safety Pick award.

The new RDX performed significantly better than its predecessor in the demanding roof strength test, which determines roof sturdiness by compressing a metal plate against the top of the test vehicle. To earn IIHS' Good rating, a vehicle must be able to withstand at least four times its weight before its roof crushes by five inches.

Whereas the old model could only withstand 2.90 times its weight, the 2013 RDX boasts a strength-to-weight ratio of 5.48 thanks to several new structural enhancements in the roof and side pillars.

Acura's TL, MDX, TSX and TSX Sport Wagon have also received the IIHS' Top Safety Pick rating; the aging RL is the sole model in the automaker's lineup without the crash test distinction.