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what isdifference between Honda 2.4L DOHC I-4 vs K24Z7 engine?

 
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erm.. which 2.4L DOHC I-4?

the k24 is a 2.4L DOHC inline 4 engine..

edit: the k24-series engines are the only inline 4 cylinder 2.4L engines Honda made. The K24Z7 just so happens to be one of them.
how honda engines nomenclature typically works:
[Letter][two numbers][1 or 2 letters/numbers]

e.g.
K24Z7
K series engine
24: 2.4L engine
Z7: model in that series engine.

The K24's have the K24A, -A2, -A3, -A4, -A8, -W2, -W3, -Z7 models.

edit 2: initially commented, then remembered your thread about knowing nothing, hence the edit. Then realized you probably heard one or the other, figured there was a difference. Figured I'd spell it out for you. Feel free to ask up more about the variances in Honda engines and we'll answer best we can.

 
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Oh are they the same thing i was looking at 2013 SI for a K24 engine but it said it had a 2.4 DOHC I4 as the engine so not sure.

Engine:
2.4L I4 DOHC 16V i-VTEC

 
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Yeah, its like saying "All purples are colors, but not all colors are purple"

K24Z7 is just specifically what engine model is under that hood.