| 11. | The engine was the new 860 cc Datsun D10 side valve four-cylinder that produced 25 horsepower.
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| 12. | Its " Tipo 98 " petrol engine was a side valve inline-four, developing at 1, 700 rpm.
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| 13. | The new detachable aluminium alloy cylinder head was fitted over inclined side valves and anodised aluminium alloy pistons.
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| 14. | There was a 348 cc side valve single for 1923, and V-twins of 498 cc and 598 cc.
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| 15. | The new engine used side valves instead of the inlet-over-exhaust ( IOE ) valve layout used in Hedstrom's designs.
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| 16. | The engine had side valves with tappets easily reached for adjustment, the generator and magneto being driven in tandem.
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| 17. | Penta then designed the four cylinder 28 hp side valve " Typ DA " engine for the Volvo �V 4.
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| 18. | Its engine was a straight-six with side valves; cylinders were still cast in pairs and it featured a nonremovable cylinder head.
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| 19. | Preproduction models of the R75 were powered by a 750 cc side valve engine, which was based on the R71 engine.
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| 20. | The first car was the "'4 litre "'made from 1935 to 1936 using a, 4, 168 cc side valve, straight-eight engine.
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