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The Square Four is a motorcycle produced by Ariel between 1931 and 1959, designed by Edward Turner, who devised the Square Four engine in 1928. At this time he was looking for work, showing drawings of his engine design to motorcycle manufacturers.
- Ariel Motors Ltd, Bournbrook , Birmingham
Nov 23, 2019 · The Ariel 4G MK II was a square four cylinder allround motorcycle produced between 1936 and 1967. It could reach a top speed of 99 mph (160 km/h). Claimed horsepower was 43.99 HP (32.8 KW) @ 5500 RPM. Undoubtedly, the most famous bike produced under the Ariel marquee was the Square Four.
Sep 10, 2018 · The Ariel Square Four is one of the most famous names among Britain’s original “big” bikes, standing side-by-side with the likes of Brough Superior and Vincent HRD.
Jul 28, 2009 · Ariel Square Four. Years produced: 1948-52 (Mk1) Total production: 1,211. Claimed power: 34bhp @ 5,400rpm. Top speed: 100mph (est.) Engine type: Overhead valve, air-cooled square four. Weight: 197kg (433lb) Price then: $658 (1952) Price now: $5,000-$9,500. MPG: 40-55.
Mar 18, 2020 · Restored around 15 years ago, this 1949 Square has covered just 420 miles since its extensive overhaul with many engine upgrades. It’s up for £17k at Motorcycles Unlimited in Greenford . Nor does a Square handle like a British twin.
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Feb 6, 2013 · The Royal Ariel Square Four. By Robert Smith. by Jeff Barger. Like many touring bikes (Honda’s Gold Wing comes to mind), the original Square Four was designed with performance in mind. 1953 Ariel 4G MKII Square Four. Claimed power: 45 hp @ 5,500 rpm. Top speed: 100 mph.
Jan 28, 2016 · The world economy was plummeting into an abyss when the Ariel 4F was introduced, a 500cc square four (51 x 61mm bore/stroke), the cylinders cast as a single piece, with a chain-driven...
