我基本不baidu任何严肃的事情
The thing is, while you can probably gain a few percent better motor efficiency at higher speeds from a multispeed transmission, you pay for it with a bunch of weight and complexity - and you lose efficiency in the transmission which may or may not be less than the the motor gain.
Who cares about losing a drag race above 60 mph? They're not designing a top fuel funny car here, it's a high end touring sedan.
简单来说就是没必要，当然如果硬来的话也可能成本有点贵，但主要是没必要
【 在 west 的大作中提到: 】
: 随便百度一下都有
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