This year 115 vehicles received an excellent or good rating for occupant protection in a crash but 96 models were considered poor or very poor.
The guide included of hospital records from New South Wales for the first time which was used alongside real world data from more than 7.5 million road crashes in New Zealand and Australia and more than 1.7 million injured people.
The ratings were calculated using an internationally reviewed method and were influenced by the vehicle's mass, the structural design of the body and the safety features fitted to the vehicle, such as airbags and types of seat belts.
It also took into account the types of people who drove different cars but as far as possible the analysts looked at how the vehicle contributed to injuries in the crash, rather than the driver or where it was.
But Stocks said the guide also showed there were safe choices available at every point in the market.
"A large number of the vehicles with excellent ratings are available second-hand for less than $15,000 and many for less than $10,000."
On TradeMe yesterday afternoon, there were 42 listings for one of the models with a Safe Pick - the Mazda Rx-8 - being sold for $10,000 or under.
• To see the full 2016 Used Car Safety Ratings guide visit www.aa.co.nz/UCSR2016