Ariel Square Four
77/100 Overall
58 On the road95 As a classic
Classic motorcycle head-to-head
Ariel Square Four vs Harley-Davidson FLH Shovelhead
Ariel Square Four scores 77/100 overall against Harley-Davidson FLH Shovelhead on 74/100. On the road: 58–58. As classics: 95–90. Overall result: Ariel Square Four.
Photo: Classic & Classy Motorcycles Ltd · Owned by Classic & Classy Motorcycles Ltd
Harley-Davidson FLH Shovelhead
74/100 Overall
58 On the road90 As a classic
The numbers
Category-by-category result
| Category | Ariel Square Four | Harley-Davidson FLH | Advantage |
|---|---|---|---|
| road | |||
| PerformanceDirect comparison of power, acceleration and usable performance across the pre-1990 classic field. | 7 | 5 | Ariel Square Four |
| HandlingSteering, stability, weight and real-road manners. | 6 | 4 | Ariel Square Four |
| BrakingDirect comparison of real stopping ability without an age allowance. | 4 | 4 | Level |
| ReliabilityEngine, electrics and general dependability when properly maintained. | 5 | 5 | Level |
| Ease of ownershipMaintenance, parts supply and access to specialist knowledge. | 5 | 8 | Harley-Davidson FLH |
| ComfortRiding position, vibration and suitability for longer journeys. | 8 | 9 | Harley-Davidson FLH |
| classic | |||
| StylingDesign quality, visual presence and period appeal. | 9 | 9 | Level |
| Historical importanceInfluence on motorcycling and importance within its era. | 10 | 9 | Ariel Square Four |
| Collector appealLong-term desirability among classic motorcycle enthusiasts. | 9 | 8 | Ariel Square Four |
| CharacterSound, feel, personality and memorable riding experience. | 10 | 10 | Level |
Choose the Ariel Square Four if…
you want unique engineering, refined four-cylinder character and one of Britain's most distinctive luxury motorcycles.
Choose the Harley-Davidson FLH if…
you want relaxed long-distance presence, unmistakable American V-twin character and traditional Harley styling.
Background
History
Ariel Square Four
The Ariel Square Four was produced from 1931–1959 and used a air-cooled square-four engine. Within this comparison library it stands out particularly for historic importance, character, styling. It suits riders who value the qualities described in its original profile rather than choosing by specification alone.
Harley-Davidson FLH
The Harley-Davidson FLH Shovelhead was produced from 1966–1984 and used a Air-cooled 45-degree Shovelhead V-twin. Within this comparison library it stands out particularly for character, styling, historic importance. It suits riders who value the qualities described in its original profile rather than choosing by specification alone.
Interesting details
Did you know?
Ariel Square Four
- Its production span in this library runs from 1931 to 1959.
- The recorded engine description is: air-cooled square-four engine.
- Its strongest comparison scores are historic importance, character, styling.
Harley-Davidson FLH
- Its production span in this library runs from 1966 to 1984.
- The recorded engine description is: Air-cooled 45-degree Shovelhead V-twin.
- Its strongest comparison scores are character, styling, historic importance.
Present-day appeal
Collector notes
Ariel Square Four
Collector interest is strongest where condition, originality and correct period details support the identity of the Ariel Square Four. Its library score for historic importance is 10/10. Values and desirability can vary substantially between years, specifications and restoration quality, so individual examples should be assessed on their own evidence.
Harley-Davidson FLH
Collector interest is strongest where condition, originality and correct period details support the identity of the Harley-Davidson FLH Shovelhead. Its library score for character is 10/10. Values and desirability can vary substantially between years, specifications and restoration quality, so individual examples should be assessed on their own evidence.
Before you buy
Buying checks
Ariel Square Four
- Confirm the frame and engine identity match the advertised model and year.
- Check cold starting, smoke, oil leaks and unusual mechanical noise.
- Inspect the frame, wheels, brakes and suspension for wear, damage or poor repairs.
- Verify that important model-specific parts have not been replaced with incorrect later components.
- Review the paperwork, ownership history and any restoration invoices before purchase.
Harley-Davidson FLH
- Confirm the frame and engine identity match the advertised model and year.
- Check cold starting, smoke, oil leaks and unusual mechanical noise.
- Check primary drive, charging system, engine mounts and evidence of non-standard modifications.
- Inspect the frame, wheels, brakes and suspension for wear, damage or poor repairs.
- Verify that important model-specific parts have not been replaced with incorrect later components.
- Review the paperwork, ownership history and any restoration invoices before purchase.
Period opposition
Historic rivals
Rivals to the Ariel Square Four
Rivals to the Harley-Davidson FLH
Final result
The verdict
On the road the motorcycles finish level. Ariel Square Four wins the classic-motorcycle comparison. Ariel Square Four takes the overall result after the road and classic scores are weighted equally.