Oversquare turbo diesel engine V.S. Undersquare turbo diesel engine

[JR318]

sa tingin ko e depende na iyan sa application. kung sa akin lamang e i would prefer undersquare than over. mas relaxed idrive ang undersquare lalo na sa hill climb with a heavy load.

pero kung need for speed ka e oversquare.

brader JR318, yung UNDERsquare e mas malaki dimension ng stroke kesa cylinder bore (diameter ng piston). ibig sabihin mas malaki ang buwelo ng piston during the power stroke.

kung OVERsquare naman e mas mabilis nyang tapusin ang apat na stroke sa isang cycle ("mas mabilis ang ikot ng makina")

may mga factors pa rin na makakaapekto sa bawat isa. kaso dudugo na ilong ko sa usapang iyon. hanggan jan na lang. hehe

Salamat po brother MIKE, isa pang tanong sir yung oto kong hyundai SF3 oversquare po ba?
kasi sobrang tulin e jeje.TIA

[niky]

Doesn't really matter when talking about diesels, anyway.

Most modern diesels I can think of are either undersquare or massively undersquare. It's very difficult to make an engine that can withstand the stress involved when you rev a diesel past 5k rpm... so there's no real need to make an oversquare diesel.

[jut703]

As end-users, what matters is how the car drives - whether it's torquey, rev-happy, etc. Which is why people are better off seeing the horsepower and torque figures as well as the respective powerbands. But even then, paper specs don't always translate to real world performance so an actual test drive is still the best indicator of how an engine performs.

Unless you build your own engine you don't really have a choice regarding its bore and stroke. And even then, bore and stroke aren't the only things that define an engine's characteristics.