F4 - h4?

[hultman]

Looking to buy my first WRX, and I keep seeing engine references either F4 or H4. What's the difference?

[man show]

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.

[RcrsWetDream]

^ 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

[brfatal]

Technically speaking it's an H-4.

[man show]

Technically speaking, shaddup!

[psinuse]

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*

[brfatal]

Technically speaking I have the slowest Subaru here.

It will only go as fast as you can push it.

[man show]

Don't worry brfatal, I'll find you a really big hill to push your car down!