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Old 25th October 2009, 20:38   #301
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Whats the difference between VVT engine and earlier engine of SX4. One can currently get 50k discount on older model.

Is it worth losing 50k discounts + increased price (assumed) for new SX4 or should I go in for previous model?
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Old 25th October 2009, 22:33   #302
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Originally Posted by compenn View Post
Whats the difference between VVT engine and earlier engine of SX4. One can currently get 50k discount on older model.

Is it worth losing 50k discounts + increased price (assumed) for new SX4 or should I go in for previous model?
Its VVT engine is equipped with Variable Valve Timing. Modern VVT allow variable lift + variable cam phasing. Earlier only lift was changed, but later on cam phasing also came in. Nissan VVEL, Toyota Valvematic and Advanced VTEC are the latest and most effective variable valve timing systems.

What this helps is in overall increase in torque and power along with a better spread of torque and power throughout the powerband.

A thread on TBHP for VVT :

http://www.team-bhp.com/forum/techni...on-thread.html (Variable Valve Timing discussion thread)
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Old 26th October 2009, 00:38   #303
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New SX4 specs

Engine:
Max Output 104.68ps @ 5600 RPM
Max Torque 145NM @ 4100 RPM
Don't really see any change in driving, practically speaking.
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Old 26th October 2009, 06:55   #304
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Originally Posted by compenn View Post
Whats the difference between VVT engine and earlier engine of SX4. One can currently get 50k discount on older model.

Is it worth losing 50k discounts + increased price (assumed) for new SX4 or should I go in for previous model?

In layman terms VVT is a piston technology that allows for variable valve opening / closing time (VVT - Variable Valve Timing) thereby the controlling the amount of air intake into the engine. The amount of air+fuel mixture ratio cannot be constant across the RPM level (Of course non VVT technologies control this mix based on the engine RPM and ECU tuning but not as good as VVT). One has to have more air intake at higher revs for better performance of the engine but at the same time to much air in engine at lower RPM might stall it - basic engine science. So with VVT controlling the air intake dynamically you will have a better throughput from the engine across the RPM band and an increased fuel economy since the right mixture of air/fuel is burnt. This is the primary theory though there is a lot more to VVT technology that you can Google for yourself.

As for spending a additional 50 - 80K, if you are looking for a long term ownership and if you are driving enthusiast, i would suggest you go for the VVT engine. You will have improved engine performance at lower power band that SX4 suffers from right now. You may also see a better mileage if you drive it rightly. Tip - Honda is known for its fuel economy with better power because its VTEC is one of the better designed VVT technology.

Last edited by srikanths1 : 26th October 2009 at 07:03.
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Old 26th October 2009, 10:09   #305
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With the SX4 brochure already been leaked by Sid on another thread as the starting thread, shouldn't this thread be closed now or merged with the SX4 Brochure thread?
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Old 26th October 2009, 14:35   #306
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Hi All please continue the discussion on new SX4 in This Thread (New SX4 VVT brochure)

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