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Motorcycles Unlimited / Classic Bike EmporiumMotorcycles Unlimited / Classic Bike Emporium
24 Medway Parade Welland Gardens Greenford Middlesex
tel: 020 8997 2421     07973 11 12 13
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1931 Ultra Rare 500cc Square Four. For Sale


Also have a [email protected]@k at this link below
- details above

1931 Ariel Square Four 500cc Model 4F engine design by Edward Turner.

Edward Turner (January 23rd, 1901 – April 15, 1973) was a famous British motorcycle designer. He was born in Camberwell in the London Borough of Southwark, London, on the day King Edward VII was proclaimed King.

Following a rather basic schooling he joined the Merchant Navy as a radio operator, aged 14. By the 1920s he had left the sea, and was running a motorcycle shop in South London where he showed the first signs of what would be a distinguished career by designing and building his own "Turner Special". In 1927 he joined the Ariel Company where he was part of the team that developed the famous Ariel Square Four, and by 1932 had become Ariel's chief designer.

Rare 500cc model not 600cc or 1000cc.

The last picture shows the engine designer Edward Turner with the 1931 4F 500cc

Turner had shown the design to several motorcycle manufacturers (including BSA) seeking a buyer for the innovative design but only Jack Sangster at Ariel was interested enough to offer the young engineer a job. At its public unveiling at the Olympia Motorcycle Show in late-1930 the 1931 Ariel Square-Four 4F caused a huge sensation, even over the new Matchless Silver Hawk narrow-angle v-four OHC.

If you cannot afford to splash out £300,000 'Three Hundred Thousand Pounds' on a Brough Superior then this is possibly or probably the next best great British superbike for £35k, Great investment opportunity.

You are not going to find another one.

ULTRA ULTRA RARE 1931 Ariel Square Four 500cc OHC / Over Head Cam model. This machine comes with a current V5C and is on its original number which is transferrable. I imagine it is worth something, but I am not an expert. WO was issued to the Monmouthshire area in 1931. The bike is tax and MOT exempt at this age.
This bike has been in the ownership of one family from new and is only on its third keeper. The bike is basically un-restored and runs like a watch, All original fittings, and everything works at it should. It has clearly had a new exhaust system though at some point. The engine numbers started at 101....this is engine number effectively the 119th ever built. Is this therefore the oldest unrestored square on Earth ? has anyone got an older one out there in original condition ????? If so....I would love to hear about it. The factory records have been checked and the engine and frame numbers correspond. This was one of five built in March 1931 and this one was despatched to Bowens Garage LTD in Monmouthsire. You will note that this machine carries the original dealers brass plates on both front and rear mudguards indicating again that these are the correct originals as fitted to the machine.
I can say that I have ridden the machine today around a large car park for several minutes and it performed well. This is not the same as a proper road test, but tells me that the clutch, gears, brakes etc all seem to be working alright. It is charging strongly, and revs freely. Even the original brass map light works. Wheels and rims look authentic. This is a four speed hand change model.
So....this is a rare opportunity to buy one of the worlds first super bikes. Possibly the oldest unrestored Square left on Earth. Note, this is the engine where the crankcases spilt horizontally, like the Japanese bikes do, what a pity they did not continue with this type of design. Oil is held in the engine in the same way and when I look at this truly is years ahead of its time.
All that said.....this is looking for that rare collector / rider who will appreciate what this actually is. The question of restoring it or not will be up to you. I would love to see this out at shows and actually being used. If you buy are pretty much guaranteed not to meet another as authentic as this. I would look at taking early machines in exchange....but am happy with a straight sale. No credit cards or Paypal on a deal like this, cheque, bank transfer, bankers draft, switch card or £££££....all good.
Viewing is vary much advised. Please call and ask for Frank on the details below or 07973 11 12 13 for an appointment.

Email: using the button below

Website: - details above

Also please have a look at this link reference the rarest of all Ariel model which is the same as ours:
- details above


Delivery can easily be arranged anywhere in the England and Wales, please enquire.

World Wide Shipping Easily Organised With - details above

These prices are based on a standard classic sized motorcycle – any bookings that are made, we will need to quote based on the specific bike, as the crate size may need to be bigger if it is a larger classic – this will then increase the shipping freight costs.

Perth £908.00 Sailing time 4 weeks
Sydney £955.00 Sailing time 6 weeks
Melbourne £955.00 Sailing time 6 weeks
Brisbane £920.00 Sailing time 5 weeks

New Zealand
Auckland £908.00 Sailing time 6 weeks
Christchurch £1140.00 Sailing time 6 weeks

Yokohama £930.00 Sailing time 6 weeks

Boston £880.00 Sailing time 3 weeks
New York £845.00 Sailing time 3 weeks
Chicago £939.00 Sailing time 3 weeks
Atlanta £950.00 Sailing time 3 weeks
Baltimore £880.00 Sailing time 3 weeks
Miami £974.00 Sailing time 3 weeks
Houston £927.00 Sailing time 3 weeks
Los Angeles £962.00 Sailing time 5 weeks
San Francisco £1009.00 Sailing time 6 weeks
Seattle £1021.00 Sailing time 6 weeks

Jebel Ali £808.00 Sailing time 3 weeks

Shanghai £806.00 Sailing time 4 weeks

Toronto £1021.00 Sailing time 3 weeks
Vancouver £1138.00 Sailing time 4 weeks
Montreal £1009.00 Sailing time 2 weeks

For all other countries please email us your address/location for a quote.

These prices include collection, packing, freight, fuel surcharges, documentation, handling and export clearances. The customer will then need to pay any import formalities and import clearances on arrival of the motorcycle at destination.

We can also put the customer in contact with an arrivals agent at destination to assist with arrival formalities and charges. They can also assist with forward delivery as required.

For shipments to Australia, Vehicle Import Approval (VIA) must be obtained prior to arrival in Australia. Applications usually take from 4-6 weeks to process and be returned. You can also apply for VIA online here.

The Australian Department of Infrastructure and Transport will require you to apply for the permit to import a vehicle. It normally takes between 15-20 days to process applications. The import procedure can be found here.

Optional Services:
Insurance may be organised to cover the motorcycle for loss or damage during ocean transit. This is based on 1.5% of the bikes value + freight + 10%.

Price £35000 As stated
Ad Type For Sale
Category Motorcycles
Make Ariel
Model square four
Year 1931
Country UK
Region Middlesex
Telephone 020 8997 2421
Status Trade
Date 14-Jul-2019
Ref C891963

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