Seems like Toyota is updating its powertrains with dual VVT-i for a smoother powerband, increased gas mileage, and cleaner emissions. The new 2AZ will first debut in the new RAV4, and then the 2007 Camry.
Quote:
Originally Posted by Toyota
The standard powertrain has also been improved, boasting a 2.4-liter four-cylinder engine with dual VVT-i and 166 horsepower, making it one of the leaders in four-cylinder power in the small SUV segment.
Unless the person that wrote it online mistaken it for another engine or cut and pasted the information from the previous sentence referring to the 3.5L:
Quote:
Originally Posted by ToyotaUSAWebsite
Performance was key in redesigning the 2006 RAV4. Its optional, class-leading 3.5-liter Dual VVT-i V6 [1] engine has an astounding 269 horsepower. The standard powertrain has also been improved, boasting a 2.4-liter four-cylinder engine with dual VVT-i and 166 horsepower, making it one of the leaders in four-cylinder power in the small SUV segment. Add improved fuel economy ratings to the mix, and you've got one compact SUV to be reckoned with.
Unless the person that wrote it online mistaken it for another engine or cut and pasted the information from the previous sentence referring to the 3.5L:
Interesting. So it is indeed straight from Toyota.
It is strange then that here it is not listed as Dual VVT-i.
To be honest, I think it's more likely than not than it has Dual VVT-i. I mean fuel economy remains the same as the outgoing Rav 4 2.4L, despite the new one being heavier and having more power. With 4wd, the 2.4L actually gets better economy than the outgoing 4wd Rav, thanks to the electronically controlled system.
Unless the person that wrote it online mistaken it for another engine or cut and pasted the information from the previous sentence referring to the 3.5L:
Actually you're right. I've mistaken Dual VVT-i to VVTL-i.
You can find the same sentence quoted above in the Performance section of the new RAV4 page, AFTER the sentence on the 3.5L.
Dual VVT-i is important on the 2AZ because it's the volume leader, since it replaced the 5SFE in 2002. The 5SFE was sold in millions of vehicles, much like the 2AZ will be. I believe Toyota added DVVT-i to this engine to offset the on-paper horsepower/torque loss, for cleaner emissions, and for better gas mileage.
You can tune DVVT-i engines in two ways: economy or performance. The 2AZ's cams and valve timing programs are obviously based more towards economy. If you want performance, then opt for the 2GR-FE, which has a more aggressive profile. If you want a DVVT-i performance 4 cylinder, the engine will naturally be noisier and harsher than its economy based sibling: the blacktop 3SGE - 210hp @ 7600rpm/159lb-ft @ 6400rpm.
I don't believe Toyota added direct injection to the 2AZ, yet. It might be an improvement later on down the line. The 2AZ will be with Toyota for a while.
Performance was key in redesigning the 2006 RAV4. Its optional, class-leading 3.5-liter Dual VVT-i V6 [1] engine has an astounding 269 horsepower. The standard powertrain has also been improved, boasting a 2.4-liter four-cylinder engine with dual VVT-i and 166 horsepower, making it one of the leaders in four-cylinder power in the small SUV segment. Add improved fuel economy ratings to the mix, and you've got one compact SUV to be reckoned with.
I don't know of any other ways to increase power AND fuel efficiency without changing the valvetrain or injection scheme (i.e. direct injection).
EDIT: Forgot to add that DVVT-i on the 2AZ will go hand in hand with the updated Hybrid Synergy Drive in the new Camry.
Also, under the old SAE ratings, the new 2AZ would put out around 172hp. The tC should receive this engine in short time, unless it conflicts with the TRD Supercharger. If that's the case, the engine won't make it in the tC.
Okay, now I have actual proof: the 2AZ was updated with direct injection and not dual VVT-i as the text says. It is now known as the 2AZ-FSE in Japan, though this one puts out 163 metric hp @ 5800rpm and 170lb-ft @ 3800rpm. Power output is nearly identical to the RAV4, but the RAV4 gets a more powerful version, so I'd expect 166hp/173lb-ft.
Okay, now I have actual proof: the 2AZ was updated with direct injection and not dual VVT-i as the text says. It is now known as the 2AZ-FSE in Japan, though this one puts out 163 metric hp @ 5800rpm and 170lb-ft @ 3800rpm. Power output is nearly identical to the RAV4, but the RAV4 gets a more powerful version, so I'd expect 166hp/173lb-ft.
Looks like I was correct in my guess, in that the 2AZ still does not have Dual VVT-i. If it did have DVVTi, power would be higher than this. Plus, DVVTi combined with D4 injection would yield close to 200HP.
For the Rav 4, the manifold and camshaft were modified to squeeze out extra power and refinement from the 2AZ.
Also, check out the fuel economy, it's even higher than originally estimated!
4-cylinder
2WD
4WD
24/30
23/28
V6
2WD
4WD
22/29
21/28
This is amazing ... 22/29 for the V6 Rav 4? 30mpg hwy for the 2AZ? This is midsize sedan level fuel economy, in an SUV! This looks to me like best in class mileage .
Breakthrough Engine with Advanced Mechanism System
It's actually a new design from their previous engines in the past. It's not much of a difference from their old designs, but it's mainly to give out more power but still maintain it's gas efficiency in the process.
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