Bike Chronicles of India

What is actually a Long/Short (Under/Over Square) Engine? How do they differ in engine characteristics?

I clearly remember that when the TVS Apache RTR 160 was launched in 2007, TVS made sure to highlight (at least in the print media) that the engine of the RTR was an "Over Square" one. But there was never a proper explanation of what the term "over square" engine meant or what exactly was it's benefit for the rider.

Let me try to explain these terms in as simple English as possible.

The engine size along with the cubic capacity (cc) is also specified as "Bore x Stroke" dimensions of its cylinder.

Bore: The Diameter of the cylinder block

Stroke: The Depth of the cylinder block

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2010 Hero Honda Passion Pro is on sale and on streets..

Read the Review of the Hero Honda Passion Pro APDV: Click here

Accoring to me, the Hero Honda Passion (Plus/Pro) occupies a unique position in the minds of the 2 wheeler buying consumer of India. For them, the Passion probably qualifies as the most stylish among the 100 cc motorcycles.

Therefore when Honda's new (110 cc) CB Twister arrived and threatened to take away the crown as the most stylish 100 (+) cc motorcycle, a refreshed Passion Pro from Hero Honda was naturally expected to defend its position.

So there we have it, the 2010 refreshed version of the Passion Pro. The details of the Passion Pro has been very recently updated on Hero Honda's site.

I have also managed to see a couple of them plying on our roads.