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下面这位的描述应该是比较客观地描述了爬坡能力的不同表现，这是实际使用者的体会，不是纸上谈兵的公式推论。
REVS & DRIVING
Here’s a common scenario: you’re driving along at 2000rpm. You get to a hill. It’s a steep one. So, you need more torque to climb to the top. In the petrol, the torque is bugger-all at 2000rpm, even when you mash the throttle wide open. So the transmission has to throw back one or even two gears, just to get the engine revs spooling up to the optimal delivery point for enough torque at that road speed. There’s a lot of rotational intertia shunting around in the engine and gearbox in those operating conditions, and that feels undignified. In the diesel, though, you just hit the accelerator. The torque ramps up automatically to the maximum available - because you’re already at the right revs. The car climbs the hill effortlessly. At least that’s how it seems, in comparison.
下面这位的说法也比较客观，如果汽油车在上坡之前有一段加速过程，爬坡也许不会比柴油车差，但是如果在坡上起步，柴油车毫无悬念胜出。
Diesel does do better when under heavy load, because of its better low-end torque. Its because a diesel engine has its optimum performance in the low rpm range, while a petrol engine has its optimum performance in the high rpm, near the redline. If the weight of the cars and the engine sizes were the same, you might have done better if you had a running start to the hill, downshifted and kept the revolutions high during the climb.
Starting from a standstill on a hill, though, diesel is going to win.
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楼主:qilisun
发表于 2014-8-14 07:40
