We are looking for a new used car, listings show motor sizes as F4. I4. I'm assuming F4 stands for Fuel injection, but what does I4 mean?

Asked by Apr 28, 2013 at 08:28 AM

Question type: General

Just need the meaning of F4 and I4 pertaining to engine type. Advantages of both.

5 Answers


L4 or l4 means inline four ...See the following description on Wikipedia: http://en.wikipedia.org/wiki/Inline-four

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Also, the inline 4 by default (on a newer car that is) will be fuel injected, since they replaced carburetors in the late 80's.

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racer_X....you rock dude!

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Thanks Judge :)

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I4 would be a inline four. F4 I believe might mean that it's a flat 4 with horizontally opposed cylinders and pistons on either side of the engine block, opposite one another. VW Beetles, Porsches, Suburus and BMW motorcycles use this type of engine. V-type engines use an engine block with two angled parts forming the shape of the letter "V".

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