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Honda's K20 and K24 Engines: Reliable Powerhouses for Swaps

2/8/2026

41 9 Full Breakdown

Summary

Story summary

Honda's K20 and K24 engines have powered the Honda Accord and Civic since their 2001 introduction.
They are known for reliability and aftermarket support, fueling swaps into BMWs, Nissans, and other vehicles.
The K20 features an 86-millimeter bore and stroke, while the K24 uses an 87-millimeter bore and a 99-millimeter stroke, yielding a taller cylinder.
Both engines are all-aluminum, with the K24 weighing nine pounds more than the K20.

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Story summary

Honda's K20 and K24 engines have powered the Honda Accord and Civic since their 2001 introduction.
They are known for reliability and aftermarket support, fueling swaps into BMWs, Nissans, and other vehicles.
The K20 features an 86-millimeter bore and stroke, while the K24 uses an 87-millimeter bore and a 99-millimeter stroke, yielding a taller cylinder.
Both engines are all-aluminum, with the K24 weighing nine pounds more than the K20.