Yes.

 

The Volvo system you refer to is generally described as VVT, or variable valve timing. Since the camshafts operate the valves, you have to advance/retard the camshafts to change the valve timing, so variable cam timing is an accurate term, as well.

 

Doesn't VTEC use a variety of cam profiles based on engine conditions too though? I thought Volvos system only adjusts the cam timing, but doesn't have ability to switch cam profiles. I remember back when I got in the industry in 08 they were talking about solenoids replacing cams, which sounded awesome in theory, but I wasn't convinced on reliability, has anyone tried that for production?

 

My understanding of I-VTEC was it combined multiple exhaust cam profiles (with different lobes) and continuously variable cam timing. On the intake side, it was just multiple cam profiles.

So, a bit of a different approach that Volvo took, which is continuously variable cam timing on both the intake and exhaust.

Honda's ability to have different cam profiles can have some advantages (varying valve lift) at the expense of more complexity.

Fundamentally, they are trying to do the same thing.

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Profile change is pretty significant compared to just timing adjustments. It's certainly more complex, but if we're talking about "most sophisticated" then profile changes would win... and then infinite profile changes via solenoid would take the cake.

 

Or to one up….variable compression…..

 

Lots of good info here, thanks to all that replied. I’m asking because I’m about to pick up a 05 Accord coupe with i-VTEC and wondered would it had the same broad torque spread as the Volvo has.

I find it amazing how flat the torque is on Volvos 2.5t from 1500 rpm to almost redline with no wild torque changes, just smooth delivery whereas the Honda has a noticeable cam change profile. Volvo won with the smoothness and power deliver on this one imo especially with no turbo lag.

 

Lots of good info here, thanks to all that replied. I’m asking because I’m about to pick up a 05 Accord coupe with i-VTEC and wondered would it had the same broad torque spread as the Volvo has.

I find it amazing how flat the torque is on Volvos 2.5t from 1500 rpm to almost redline with no wild torque changes, just smooth delivery whereas the Honda has a noticeable cam change profile. Volvo won with the smoothness and power deliver on this one imo especially with no turbo lag.

i-VTEC means 4-cylinder, right? I believe the V6 Accord of that era is just "VTEC".

With the 2.4 Honda, you'll feel a bump in the torque at around 3.5k RPM when VTEC kicks in, yo.

It's not going to pull with the flat torque of the Volvo; you'll need to keep the revs up. I think most of the difference you're going to feel is a naturally aspirated engine vs. a small turbo. Enjoy... I had a 2.3 Accord with a manual and it wasn't a fast car but the engine liked to rev and I enjoyed winding it out...