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1932 Ariel 600cc Square Four

1932 Ariel 600cc Square Four

The original unique design of Edward Turner's four cylinder engine was in effect, a pair of vertical twin engines coupled together and driving by means of gear teeth cut into the rims of the centrally positioned flywheels. As intriduced in 1930, the engine was of 498cc capacity with a chain drivn overhead camshaft. Whilst reasonably successful, it was somewhat under-powered and a bigger version was required for side-car work. This was easily achieved in 1932 by opening up the cylinder bores by 5mm to giv a capacity of 601cc and this model was used for the Maudes Trophy test, being set to cover 700 miles in 700 minutes, following this by a timed lap of 87.4 mph. This model was produced until 1936, being replaced by the very differently designed 995cc model G4.