Here’s The Difference Between Toyota’s VVT-i and Honda’s i-VTEC

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The ultimate war between Toyota and Honda owners is mostly about which one is better. i-VTEC or VVTi? Well, this blog will clear any misunderstandings about these two technologies. We’re hopeful that it would because it isn’t about which is better.

Toyota uses VVTi (Variable Valve Timing with intelligence). As the name describes itself, the technology varies only the timing of the intake valve. If the valve was open for, let’s say; 2 seconds, it will now open for 4 seconds after VVTi is engaged. This generates more power. Also it is remains more economical at low RPMs.

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Honda thought they needed more than just varying the timing of the intake valve. And a Honda engineer came up with a solution or as we all know it better ‘i-VTEC’. It is Variable Valve Timing and Lift Electronic Control with intelligence. It does not only changes the timing that the valve is open, it also alters how deep the valve will open. If the valve opens, lets say 2 mm, it will now open 4 mm at higher revs. This increases efficiency at low RPMs and a lot of power is accessible at high RPMs; definitely more than a VVTi.

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The VVTi only alters the timing while i-VTEC alters the timing as well as lift of the valves. Also, the VVTi technology works only on the intake valve. The i-VTEC on the other hand makes changes to both, the intake and the exhaust valves.

Hence, i-VTEC is more powerful at high RPMs but is very close to being economical with VVTi at low RPMs and since both cars aren’t exactly sports cars, so there is no clear winner here because they produce ample mileage at low RPMs which is what we’re engaged with mostly.

  • Aqeel Zia Nayyer

    What about dual vvti it works on both intake and out

  • Usman Khawaja

    Mistake in Article

    Dual VVT-i works on both intake and exhaust valves in Toyota higher displacement engines like 1.6 Altis and 1.8 Altis cvt-i has Dual VVT-i, whereas 1.3 Xli Gli doesn’t posses “Dual” technology.

  • Mohsin

    Errrrrr…. Besides, what good is the power if the crank shafts and the connector rods are not able to handle it.

    I agree with the power produces in Honda engines are much higher but it becomes too much to handle for rest of the engine.

    Toyota on the other hand produce less but controlled power. It operates between 2 k to 5 k rpm power band whereas the Honda operates from 3 to 7 k power band exhausting it self at a rapid speed.

  • Abdul Arham

    Vvti does not mixes with dohc dude!
    Dohc and Sohc are both vtec
    Ues toyota vvti is also twin cam bt definitely not Dohc

  • Muneeb Khalid

    Yaar.. Twin Cam or DOHC is the same as long as both the cams in “twin Cam” are overhead ones.. Please research before your stupid comments..
    When you don’t know, its best to be silent and observe..

  • Muneeb Khalid

    Bhai the engines are designed with millions of dollars in research, they can withstand the stress.

  • usman niazi

    Please don’t call other people stupid, he wasn’t rude and you must be short tempered to get irritated by a single reply without any argument taking place. Patience please… everyone has google as its source, not the mensa iq tests.

  • abc

    After all is said and done….”since these are not sports cars” care to share your mileage for Hondas and Corollas? that should settle it for the “not sports cars” category.

  • Bilal Ahmed

    well..,,, toyota has VVTL-i that has both valve lift and timing controls…

  • Ali

    Nice article. But, I think the Dual-VVTi increases the lift too.

  • Usman Haider Sheikh

    kids these days are like daak engine dalwaya ha honda shivik ma, honda k ilawa dohc engine hota e ne un k leay kici b gari ka, where swift, corolla(all varients), liana are coming stock with dohc engine adding a small turbo vs a small turbo on their sohc can show them the advantage of having extra camshaft for intake and exhaust

  • Umar Sajjad

    This article is so wrong that I can write an article to explain how wrong it is, if I were ever bothered. If you’re having hard time grasping basic concepts of valvetrain, why write about it?

  • Irfan

    Well, how would we know you know it all if you won’t bother to explain how wrong the explaination is.
    Answer with knowledge not with ignorance.

  • Umar Sajjad

    Nice try. Still not bothered.

  • Mashood Anwar

    Informative for me 🙂

  • Haroon Iftikhar

    Please perform some more research… civic is SOHC but it has 4 valves per cylinder same as Toyota….. and VTEC also alters the lift of the valve whereas vvti or DUAL vvti does not change the valve lift, just the valve timing….

  • Haroon Iftikhar

    you might be deviating away from the topic sir…. the blog is not about mileage….

  • Haroon Iftikhar

    but is vvtl-i offered in any car in pakistan by toyota?

  • Haroon Iftikhar

    it doesn’t ..

  • Ali

    Thanks for clearing that up. Can you tell me what’s the difference between the standard VVTi and Dual VVTi?

  • Haroon Iftikhar

    A standard VVTi alters the timing of the intake valves only and not the valve lift….. A dual VVTi alters the timing of the intake and the exhaust valves both but not the valve lift of any….. You’re welcome 🙂

  • Ali

    Thanks again 🙂

  • Umair Khan

    Funny how these wars between Honda fans and Toyota fans never stop.. 😛
    Both have some amazing engine options you cant ignore, K20, F20C, H23, B16, C30A (from NSX) from Honda and 4AGE, 4EFE, JZs , 3SG (T) E (s) , 1ZZFE, 2ZZGE from Toyota… none of them can be ignored.. some of them dont even have VVti or VTEC , yet still manage to be great performers. So, enjoy the best of both worlds 😀

  • Sultan Lashari

    And he fails to mention the Shaft which is the damn difference maker..

  • Deni

    One that’s not bothered wouldn’t have even wasted energy to give comment. Nice try looking “not bothered”. Idiot.

  • Camshaft

    Your example for VVTi with it being open for 2 seconds before engaging before being activated but 4 seconds after is completely wrong. For one timing is not the same thing as duration and second duration is measured in degrees, so if your intake cam is 240° it stays 240° even with VVTi. It does affect timing but that means the intake valve opens for the same duration just at an earlier moment so the overlap with the exhaust camshaft increases, which then produces a vacuum in the cylinder chamber increases and thus increases velocity of the intake charge. i-VTEC on the other hand changes all camshaft characteristics you can have, duration, lift and timing.

  • Lol

    I guess my car is lying to me when I open the hood and it says vvti dohc. Damn Toyota.

  • Tahir Usman

    Nothing beats a Toyota engine for performance reliability and longevity

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