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Woah.....that's a broad question........I can start by saying they are different engine options available on the Ford Focus............Anyone has a better answer?........

Peace.....
 

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SPI = base model Focus engine, carried over from the days of the Escort.

Zetec = Newer, improved motor, with more power.

PZEV = Newest, most improved motor, with even more power.

As I have stated elsewhere [paranoid] each serves a purpose, as Ford has deemed fit.
 

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I think what he may be asking, is...what does SPI (for example) MEAN?
Heck, I'm not even sure...
Does it stand for...split port? or...?
 

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split port injection.
 

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SPI (2.0 L)
Split Port Induction
Single overhead cam
(not sure on valvetrain design - maybe roller finger follower)
cast iron block
aluminum head
110 hp @ 5000 rpm
125 ft lb Torque @ 3750 rpm
Bore: 3.3"
Stroke: 3.5"
Compression Ratio: 9.35:1
Hydraulic Lifters with roller tappets

Zetec (2.0 L)
Dual overhead cam
direct acting mechanical bucket
cast iron block
aluminum head
130 hp @ 5500
135 ft lb Torque @ 4500
Bore: 3.3"
Stroke: 3.5"
Compression Ratio: 9.6:1
Mechanical valve lifters

PZEV (2.3L)
Dual overhead cam
Direct Acting Mechanical Bucket
Aluminum Block
High Flow Aluminum Head
142 hp @ 5750
148 ft lb Torque @ 4000
Bore: 3.44"
Stroke: 3.70"
Compression Ratio: 9.7:1
Mechanical valve lifters
 

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So...are there pros and cons to each of the types of engines?
Is there a reason I should be happy with my split port?
Don't get me wrong...I AM happy with the performance that I've got so far...but I don't really have much of a basis for comparison either! lol
 

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Looks like the SPI has almost as much peak torque as the Zetec and at a lower RPM, making it theoretically having more "oomph" in around town stop and go driving, since you don't have to rev it as high to make max. torque.
 

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im a proud spi owner, and i take my friends with hondas off the line, and usually keep up with them on top end with my automatic. i truly know my spi aint the greatest, but im happy with it.
 

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ILLINI zx3 said:
SPI (2.0 L)
Split Port Induction
Single overhead cam
(not sure on valvetrain design - maybe roller finger follower)
cast iron block
aluminum head
110 hp @ 5000 rpm
125 ft lb Torque @ 3750 rpm
Bore: 3.3"
Stroke: 3.5"
Compression Ratio: 9.35:1
Hydraulic Lifters with roller tappets

Zetec (2.0 L)
Dual overhead cam
direct acting mechanical bucket
cast iron block
aluminum head
130 hp @ 5500
135 ft lb Torque @ 4500
Bore: 3.3"
Stroke: 3.5"
Compression Ratio: 9.6:1
Mechanical valve lifters

PZEV (2.3L)
Dual overhead cam
Direct Acting Mechanical Bucket
Aluminum Block
High Flow Aluminum Head
142 hp @ 5750
148 ft lb Torque @ 4000
Bore: 3.44"
Stroke: 3.70"
Compression Ratio: 9.7:1
Mechanical valve lifters
Where did you pull these stats from?
 

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PZEV

You know I have read this Thread being I am PZEV owner possibly without a clue. It seems that all the Mods are available to Zetec and Duratec engines, i dont see any posts on Modding PZEV's at all let alone Parts to buy. whats the Deal?
 
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