Ariel Square Four 4F 1932 600cc 4 Cylinder Start Up

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Designed by the legendary Edward Turner, the Ariel Square Four was first shown at Olympia in 1930. Unique at the time of its introduction, the ‘Squariel’, as it was swiftly dubbed, featured a single block of four cylinders and twin geared-together crankshafts with pistons phased at 180 degrees. source/image(PrtSc): classic-motorcycle.com The crankcase was split horizontally...

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