While it is available with a more-powerful eight-cylinder engine, I preferred the six-cylinder model's more nimble, better-balanced feel.

Unlike the better balanced straight-six or even the ultra-smooth V-12 engine, the humble four-cylinder generates an up and down vibration with a frequency of twice the crankshaft's rotational speed.

This paper introduce research and practice of parallel retrieval balanced auto-adapted mechanism in search engine, it proved the operation result is good by practice, and reached the re-set target.