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Thread: OHC engines VS OHV engines?

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    Default OHC engines VS OHV engines?

    Aslam O Alaikum friends,
    I have read in some comments about OHV and OHC engines. I also googled it find the full form of OHV and OHC. What I wanna know is
    1) Which one is good in performance and why?
    2) Bikes in Pakistan with OHC/OHV engines?
    3) Can one distinguish between them by seeing it?


    Thanks, in advance.

    And please don't start fight proving that one is better and other is not. I wanna know for my knowledge.


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    OHC engines are definitely better and it is why they are being used & opted world wide


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    I think suzuki GD110 uses OHC engine

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    1.OHV engine has a little edge in production, performance and maintenance over OHC as they are less complicated..

    2. piaggio 125, ahl cg and deluxe 125 plus their clones all hv OHV engines.. else all bikes available here hv OHC engines...

    3. NO, visually u can't.. unless you open up the engine...

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    Quote Originally Posted by SyedMoazzam View Post
    I think suzuki GD110 uses OHC engine
    gd uses SOHC... gs150 hv OHC...

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    Quote Originally Posted by getscorpion View Post
    gd uses SOHC... gs150 hv OHC...

    Sent from Mars using Telegraph
    If i am not wrong SOHC and OHC are one and the same. SOHC actually means single over head Cam and GS too is a single over head CAM. Just my 2 cents

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    Quote Originally Posted by IceCold View Post
    If i am not wrong SOHC and OHC are one and the same. SOHC actually means single over head Cam and GS too is a single over head CAM. Just my 2 cents
    yupe.. only cam difference...

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    Quote Originally Posted by getscorpion View Post
    1.OHV engine has a little edge in production, performance and maintenance over OHC as they are less complicated..

    2. piaggio 125, ahl cg and deluxe 125 plus their clones all hv OHV engines.. else all bikes available here hv OHC engines...

    3. NO, visually u can't.. unless you open up the engine...

    Sent from Mars using Telegraph
    Piaggio OHV is also clone of Honda CG OHV Engine

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    So OHVs are better in maintenance. And OHC are better in performance? Correct me If I miss miss-interpret. Thanks.

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    Quote Originally Posted by Motorheat View Post
    So OHVs are better in maintenance. And OHC are better in performance? Correct me If I miss miss-interpret. Thanks.
    OHV engines are old now, they're also called push rod engines and you cant find any OHV engine in modern cars or bikes. The reason they're used in the CG is they're extremely simple engines with low maintenance. No timing chains, valve controls everything. but they're not performance oriented, they're not high revving, that is their power falls off once they start reaching higher revs. OHC engines are better performing engines and modern OHCs are just as reliable. But they're slightly complicated for our jahil mechanics. In fact on OHV engines you'll have to change oil more frequently as compared to an OHC engine. this is just my percieved knowledge and shudnt be taken as the final word

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    Quote Originally Posted by ammarzahid View Post
    OHV engines are old now, they're also called push rod engines and you cant find any OHV engine in modern cars or bikes. The reason they're used in the CG is they're extremely simple engines with low maintenance. No timing chains, valve controls everything. but they're not performance oriented, they're not high revving, that is their power falls off once they start reaching higher revs. OHC engines are better performing engines and modern OHCs are just as reliable. But they're slightly complicated for our jahil mechanics. In fact on OHV engines you'll have to change oil more frequently as compared to an OHC engine. this is just my percieved knowledge and shudnt be taken as the final word
    So all Chondas, CD70, cd100 and gs150 and gd110 are OHCs.
    Thanks for detailed info.

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    even my gen is OHV pushrod engine
    and it requires frequent oil changes but one thing on low revs thesee engines are reliable not complicated
    Hanjiii Kaa Storeey Eehh !

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    Quote Originally Posted by amjad635 View Post
    Piaggio OHV is also clone of Honda CG OHV Engine
    no bro its engine is not a clone of cg.. visually it looks same but internal mechanism is different, even piston is different too.. that's the reason piaggio remains calm on higher rpms unlike cg and people compares its vibration less ride with gs 150..

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    Quote Originally Posted by Motorheat View Post
    So OHVs are better in maintenance. And OHC are better in performance? Correct me If I miss miss-interpret. Thanks.
    yupe ohv are cheap to maintain... u can can even miss one or two oil changes without harming anything..

    about performance, both engines are good performer.. OHV hv good torque from low to mid rpm, on redlining it starts loosing power.. whereas OHC hv low torque on less rpm but can achieve more speed on higher rpm...

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    Quote Originally Posted by getscorpion View Post
    yupe ohv are cheap to maintain... u can can even miss one or two oil changes without harming anything..

    about performance, both engines are good performer.. OHV hv good torque from low to mid rpm, on redlining it starts loosing power.. whereas OHC hv low torque on less rpm but can achieve more speed on higher rpm...

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    Please explain in desi language? Does it means that OHV has more pick?

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    yes OHV hv more pick and more power to bear heavy weight in initial gears... ever seen a cg shooting up even with 3 riders? that's why its fav. among mobile snatchers...

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    Quote Originally Posted by getscorpion View Post
    yes OHV hv more pick and more power to bear heavy weight in initial gears... ever seen a cg shooting up even with 3 riders? that's why its fav. among mobile snatchers...

    Sent from Mars using Telegraph
    So in the end OHV and OHC has its own merits and demerits. And this may be the reason that GD110 can beat CG125. Because CG125 is meant for easy maintenance and high pick and GD110 is meant for high performance and speed. Thanks alot.

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    Quote Originally Posted by getscorpion View Post
    yes OHV hv more pick and more power to bear heavy weight in initial gears... ever seen a cg shooting up even with 3 riders? that's why its fav. among mobile snatchers...

    Sent from Mars using Telegraph
    Scorpion brother no doubt currently in pakistan CG has great acceleration
    and that is why we consider the OHV the best in terms of pick up & acceleration
    brother still we have not seen any OHC (Example Brazil OHC CG125) with same specification as CG
    an OHC engine with same bore stroke & CC will easily clean sweep CG
    even 110cc GD which just has bigger stroke we are hearing it is beating CG in acceleration
    although still not many cases reported but some GD owners have reported that

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    Quote Originally Posted by Motorheat View Post
    So in the end OHV and OHC has its own merits and demerits. And this may be the reason that GD110 can beat CG125. Because CG125 is meant for easy maintenance and high pick and GD110 is meant for high performance and speed. Thanks alot.
    yes, both hv their own advantage/disadvantages ..no clear winner here ...it all depends on user requirement ....i think gd110 can beat cg only in longer run because of SOHC nature of revving at higher rpm, plus gd110 seems to be a gas guzzler too for its category .. so it should do it...but again, gd110 is heavier than cg and produces less bhp ... so how could it do it ..

    Quote Originally Posted by amjad635 View Post
    Scorpion brother no doubt currently in pakistan CG has great acceleration
    and that is why we consider the OHV the best in terms of pick up & acceleration
    brother still we have not seen any OHC (Example Brazil OHC CG125) with same specification as CG
    an OHC engine with same bore stroke & CC will easily clean sweep CG
    even 110cc GD which just has bigger stroke we are hearing it is beating CG in acceleration
    although still not many cases reported but some GD owners have reported that
    technically, OHV engine does put out more torque at lower rpm which OHC just can't, whether it uses a longer stroke or not ...it just each engine hv their advantages and disadvantages .. just like 80s two stroke yamaha RX 115cc, which can clean sweep all 100,125,150 ohv/ohc bikes available here in a matter of seconds ... but two stroke hv their own disadvantages ...

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    When I was googling about these things I also found somewhere that Cruiser type motorcycles still prefer OHV engine.

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