The IIHS Front Offset results use a stationary barrier, and therefore simulates a head-on collision with a vehicle of the same size and weight. It's true, as you say, that a heavier vehicle, like the BMW 5-series has an advantage over a Yaris in a head-on collision, and the IIHS Front Offset results aren't comparable in this case. However, this type of head-on collision accounts for only a small fraction of fatal crashes. I am currently summarizing this data, and will post it later. (data source, http://www-fars.nhtsa.dot.gov)
The Side Impact results, however can be compared directly between the BMW 5-Series and Toyota Yaris because IIHS uses a "sled", which simulates an SUV hitting the side of the vehicle.
The BMW performed worse than the Yaris because of possible injuries to the torso, even though both vehicles were equipped with side torso airbags. From the pictures, it is clear that the BMW's center pillar intrudes deeply into the driver's seat.
Again, my main point here is not to say that one vehicle is clearly safer than another. My point is that good design is the most important factor in choosing a safe car, and that even small cars can be made safe with good design.
The converse is not true, and large cars are not automatically safe if they are poorly designed. Police cars are a perfect example of this. The Ford Crown Victoria that many police in the U.S. still use is a good example and it performs worse in Side Impact than any vehicles in my initial comparison.
I suspect that U.S. police used this car because 1) it's made in America, 2) it's relatively cheap, with a powerful V-8 engine, and 3) it has a large back seat and trunk. In other words, like everyone buying a car, police must consider a lot of factors, and safety is only one of them.
回复:严重误导!如果Yaris 和 BMW5系相撞谁活下来的机会大?
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A very strong arguement also from IIHS!
-jgsaron-
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11/14/2008 postreply
07:25:32