I'm all for a lot of modern car designs, but if there's one element I hate, it's the trend towards tall doors and high belt-lines. Before I acknowledge the main purpose for this practice, I can't help but wonder if part of it's by choice. The Chrysler 300 was quite an influential car when it was released a decade ago. Since so may people bought them pretty much based off looks alone, it's only a given the other manufacturers would take note and incorporate appealing elements from the 300 into their own designs. The 300's trademark (other than looking enough like a Bentley to win over hood rats) was that high-waisted, tiny window look that gave off the impression of a muscular car.
Before the 300 came out, the door to window ratio on most cars was pretty normal:
Now there's this style where the doors are very tall and the windows are very short. In more extreme cases (like these), it almost gives off the impression that the car was actually built off a crossover or SUV's platform, with the only difference being that their tall greenhouse was lopped off in favor of a sedan's roof.
One reason behind higher belt-lines is for aerodynamics. I can see the purpose of that, but then there's cars like a decade-old Lexus LS430 that are just as aerodynamic (or moreso) than new cars, without having such exaggerated qualities.
The new Impala has a drag coefficient of 0.296, whereas the Lexus is 0.26. That Lexus' advantage improves with an air suspension, which reduces that rating to 0.25. The Impala
should more aerodynamic than the LS, seeing that it has a number of wind blockers, grille shutters
* and and underside aeropanels
*. The Impala's about four and a half inches longer than the Lexus (201.3 versus 196.7), yet it's still less aerodynamic. Examining the Lexus closely, you can find a few intentional ripples in the bodywork, but adding all those cues together just doesn't compare to the Impala's very chiseled, sculpted bodywork. Basically, I'm wondering out loud why the Impala, despite having a more advanced and advantageous design, falls short of the outdated Lexus that sports a rather basic, upright design.
Of course, the other big reason behind this is safety. The LS430 has side curtain airbags and torso airbags for the front seats. The Impala has side curtain airbags, torso airbags for the front
and rear seats. The IIHS say the new Impala is very safe, scoring good in moderate frontal overlap and side impact test. Unfortunately, I was not able to find a side impact statistic for the Lexus' side impact score, but the same source indicated that it scored good in the moderate frontal overlap test. The Impala will probably hold the higher side impact score, since it has more airbags for that region.
So the Lexus is more aerodynamic than the Impala, but falls short of it in airbag count and possible side impact scores. What I'm wondering is how essential the Impala's very high-waisted design is to its good safety rating, since I'm not too educated on the matter.
*four cylinder only