The first production car engine with variable valve timing (VVT) came from Alfa Romeo in 1980. It was installed in the fuel-injected Alfa Romeo Spider. Before this, a few experimental systems ...

The throw is short and mechanical, while the red-stitched leather shift boot and manual gear diagram etched on the top add a layer of visual flair. Sure, the metal knob gets cold in winter ...

This article was originally published with the title “ The Stevens Valve Gear for Marine Engines ” in SA Supplements Vol. 45 No. 1151supp (January 1898), p. 18393 doi:10.1038 ...

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