Vauxhall Slant-4 engine

The Slant-4, or Slant Four, was an inline four-cylinder petrol car engine made by Vauxhall Motors and unveiled in 1966. It was among the first production engines to drive its single overhead camshaft with a timing belt, in the same year as the Fiat Twin Cam and the Pontiac straight-6 OHC. It took its name from its cylinders, which lean about 45 degrees from vertical, a layout that came from a plan for a whole family of petrol and diesel slant fours and V8s under chief engineer John Alden, of which only the petrol four reached production. The block and crossflow head are cast iron, and the strong block, built to stand diesel stresses, made the engine popular with tuners. The first production car to use it was the 1967 FD Victor. Production ended in 1983 for cars, and the engine stayed in the Bedford CF van well into the 1980s. Its block also served as a development mule for the Lotus 900 series.