Mini vs. Midsize in Crash Test

April 14, 2009 — -- When it comes to vehicular safety, size matters -- a lot, according to a recent crash test.

"It's physics," Insurance Institute for Highway Safety president Adrian Lund said. "It's a law that with the weight and size advantage of the larger cars, they're always going to have a safety advantage in crashes."

The Insurance Institute for Highway Safety tested three of the safest mini cars on the market by deliberately crashing them head-on into midsize cars made by the same manufacturers.

In each of the tests, the large-model vehicle did best, although manufacturers argue that the tests are conducted at speeds that drivers are unlikely to reach in actual crashes.

Still, the report noted that the results are an indication of the relative safety of people riding in small cars as opposed to larger cars. It said the people riding in the smaller car would be at a disadvantage because the smaller car would be pushed backward by the larger vehicle during impact.

Indeed, the death rate for people in mini cars involved in crashes was almost twice that of people in large cars in 2007, according to the U.S. Department of Transportation.

The miniature Honda Fit was pitted against the midsize Accord, while the Toyota Yaris went up against the Camry in the institute's crash tests.

In both cases, the smaller cars suffered much more damage than their midsize counterparts. The Toyota Camry actually intruded far into the Yaris' passenger compartment.

The institute said that was because smaller vehicles do not have a long hood to cushion the blow.

The standard also held true even for luxury-brand cars.

The Smart Fortwo hybrid vehicle, made by Mercedes, went airborne when crashed into the heavier Mercedes C Class. The heavier car always strikes the lighter one with more force, according to the institute.

Despite they're enduring more damage than the larger cars, all three mini cars tested by the Insurance Institute for Highway Safety passed every government crash test.

All three did well in the institute's frontal offset barrier test, but all three did poorly in frontal collisions with midsize cars.

The tests illustrated one major point, however. "When it comes to cars, size matters," Lund said.

The cars' manufacturers said the institute's head-on tests are unfair, because they are conducted at speeds that exceed the vast majority of real-world crashes. But the institute said it has been conducting similar tests for years.

"This nonstandard crash test performed by the Insurance Institute for Highway Safety (IIHS) simulates a crash situation that is rare and extreme. The test used an extremely high crash severity which is unlikely to occur in real world crashes. In fact, less than 1 percent of all crashes fall within these parameters.

"The test conducted by the IIHS was not consistent with how federal regulators evaluate vehicles in crash tests. The National Highway Traffic Safety Administration requires that cars and trucks of all sizes meet stringent safety requirements.

"The Smart Fortwo meets or exceeds all U.S. government crash test standards, including a five-star side crash rating, and previously earned the highest scores for front- and side-crash worthiness from the IIHS in its standard test. The Smart Fortwo is equipped with advanced crash avoidance and crash protection safety systems, including electronic stability program (esp), and a reinforced steel safety cage called a tridion safety cell, which is standard equipment on all models.

"For the past decade, Smart has a proven track record of safety with approximately 1 million cars on the road in 37 countries. People drive small cars for many reasons, not just fuel economy, as the IIHS states. People choose small vehicles because they are generally more environmentally friendly, a great value, they provide for greater driving and parking options in congested urban areas and many consumers tell us they are simply more fun to drive."