| 31. | The compression ratio was changed to 11, 3 : 1.
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| 32. | The higher the compression ratio, the more heat is produced.
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| 33. | Compression ratio was increased and a lightweight head installed.
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| 34. | The engine has compression ratio of 11 : 1.
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| 35. | Compression ratio of 9.7 : 1 was kept unchanged.
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| 36. | All years had an 8.5 : 1 compression ratio.
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| 37. | It is, of course, altered by compression ratio changes.
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| 38. | The compression ratio was changed to 8.6 : 1.
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| 39. | This version has an 8.2 : 1 compression ratio.
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| 40. | The compression ratio was changed to 10.8 : 1.
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