F4 - h4? - Subaru WRX Forum
 
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#1 Old 11-16-2012, 04:58 PM
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F4 - h4?

Looking to buy my first WRX, and I keep seeing engine references either F4 or H4. What's the difference?
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#2 Old 11-16-2012, 07:39 PM
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They are just two different acronyms for the same engine.

F4 = Flat four cylinder engine.

H4 = Horizontally-opposed four cylinder engine.

Both refer to Subaru's horizontally opposed piston design, also known as a boxer-style engine. The main benefits of this style engine are that (1) the engine is naturally balanced and (2) it helps keep the center of gravity lower.

John
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#3 Old 11-16-2012, 09:52 PM
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^ Don't listen to this guy.

It's actually referring to the jet engine from an F-4 Phantom that the WRX has. Something along the lines of 10,000hp equivalent of thrust.

Ok he's right

-Chris
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#4 Old 11-16-2012, 10:08 PM
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Technically speaking it's an H-4.
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#5 Old 11-17-2012, 08:36 AM
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Technically speaking, shaddup!

John
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#6 Old 11-17-2012, 03:09 PM
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These guys are all full of it.... F4 stands for the upgraded version of the F1 motor that comes in the the race car... H4 stands for the 4 wheel drive system.... Geez you'd think all these guys with the "fast subaurs" would know this.... *snicker*

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#7 Old 11-17-2012, 04:03 PM
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Technically speaking I have the slowest Subaru here.

It will only go as fast as you can push it.
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#8 Old 11-19-2012, 10:47 AM
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Don't worry brfatal, I'll find you a really big hill to push your car down!

John
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