- Motorcycle
- Ariel
- Ariel Square Four 1000 (0 offers)
Ariel Square Four 1000 Classic Bikes for Sale
The Ariel Square Four 1000, especially in its MK II form, stands out with its unique four-cylinder, square configuration engine and 1000 cc displacement. Renowned for strong performance and advanced engineering for its era, it remains an impressive highlight in classic British motorcycle history.
Search results
Currently, there are no matching listings for your search.
Create search alert
Let yourself be notified as soon as a listing is published that matches your search filters.
Create listing
Do you have a Ariel Square Four 1000 that you want to sell? Then create a listing now.
Create listingAriel Square Four 1000 listing references from Classic Trader
Below you will find listings related to your search that are no longer available on Classic Trader. Use this information to gain insight into availability, value trends, and current pricing for a "Ariel Square Four 1000" to make a more informed purchasing decision.
1951 | Ariel Square Four 1000
1951 Ariel Square Four 997cc Project
1954 | Ariel Square Four 1000
1956 | Ariel Square Four 1000
Long term ownership, well sorted bike
1957 | Ariel Square Four 1000
1958 | Ariel Square Four 1000
Rare, beautiful and ready for a funny ride
1955 | Ariel Square Four 1000
-
1948 | Ariel Square Four 1000
1951 | Ariel Square Four 1000
Andere Ariel Square Four 1000 Vierzylinder Deluxe
Create search alert
Let yourself be notified as soon as a listing is published that matches your search filters.
Create listing
Do you have a Ariel Square Four 1000 that you want to sell? Then create a listing now.
Create listingAriel Square Four 1000 Classic Motorbikes: Prices & Market Values
The market value of Ariel Square Four 1000 motorcycles is primarily determined by technical condition, originality, and mileage, as well as rarity, history, and documentation. A well-maintained, largely original vehicle with low, verifiable mileage and a complete history including expert reports and documentation generally achieves significantly higher prices than a comparable vehicle with deferred maintenance, extensive modifications, or an unclear provenance.
Ariel Square Four 1000: Market Prices & Value Trends
Based on Classic Trader marketplace sales data from August 2021 to February 2024, the Ariel Square Four 1000 shows a broadly stable market with modest fluctuations rather than a clear up- or downtrend. Most recorded prices sit in the mid-teens, with repeated transactions around £12,978–£13,695 for mid-1950s bikes (e.g., 1954–1958) and stronger figures around £18,664–£19,999 for late-1930s examples (1937–1939), likely reflecting earlier production appeal and collectability. At the lower end, £8,681 appears more than once for 1951 bikes, suggesting entry pricing for usable but less premium examples. Excluding isolated lows and highs, a realistic current market range is roughly £13,000 to £19,000, with condition, originality, and restoration quality doing most of the work on value. With relatively few data points, this is best read as a dependable guide: demand appears steady, supported by the Square Four’s distinctive engineering, 40 hp specification, and enduring classic British motorcycle status in GB and wider Europe.
History of the Ariel Square Four 1000
First launched in 1930, the Ariel Square Four represented a milestone in motorcycle engineering with its innovative square-four cylinder layout. The design, featuring two parallel crankshafts, was intended by engineer Edward Turner to deliver the smoothness and power then rivalled only by much larger or more expensive bikes. Over the years, the Square Four series evolved, culminating in the technically advanced MK II model. For its time, the Square Four was considered highly desirable, carrying a premium price tag and symbolising luxurious British two-wheeled touring.
Model Series History
The Ariel Square Four saw its debut in 1930. Throughout several iterations, the model's major revision came with the MK II version, the ultimate stage in its development. Earlier versions had smaller displacements and less power. The MK II, famous for its 1000 cc engine and four exhaust headers, remained the pinnacle of the Square Four range until the end of production.
Special Features and Market Highlights
A defining attribute of the Square Four 1000 is its engine layout: four cylinders arranged in a compact square formation. This design not only made for a more compact motorcycle but also contributed to notable engine smoothness and impressive performance. The MK II version delivered 42 hp, positioning the Ariel above many contemporaries in horsepower output. Distinctive four exhaust headers and a robust 1000 cc displacement lend the Square Four a unique mechanical presence.
Technical Data
Special Editions and Collectible Models
Within the Square Four series, the MK II stands out as the most evolved and recognisable version, particularly due to its four exhaust manifolds and increased displacement. No factory-limited special editions are documented, but the MK II is often targeted by collectors due to these advancements and its position as the final form of the model.
Weak Spots and Common Issues
No specific weak spots or common issues are documented for the Ariel Square Four 1000 in our current dataset. As always, with motorcycles of this age and complexity, regular maintenance and careful inspection of the engine's cooling and lubrication systems are advisable, given the innovative cylinder arrangement and period engineering.
Engine Performance, Transmission and Handling
The Square Four 1000 impressed in its time with excellent horsepower output from its 1000 cc engine, delivering 42 hp via the advanced square-four layout. This resulted in smooth, linear power delivery and distinctive character on the road. The compact engine layout kept weight distribution favourable, enhancing stability and control compared to large V-twins of the same era. - Ariel Square Four 1000 MK II (42 hp, four exhaust manifolds, advanced engine layout)
- Earlier Square Four models (smaller displacement, less horsepower, development led to the MK II improvements)
Interior, Comfort, Exterior and Design
The Ariel Square Four 1000 MK II is recognisable not just by its unique engine, but also by its styling cues: pronounced chrome details, classic British frame design, and the signature four-exhaust pipes. Materials are typical of its time—steel bodywork, leather saddle, and chrome-plated components. The four manifold exhaust system is both a design and engineering statement, now emblematic for the model. While luxury accessories were rare, the high price point meant that many bikes were cherished and maintained to a high standard. Special factory accessories or options beyond standard equipment are not well documented, but period luggage racks and touring gear were popular among owners.
Further Features
At its introduction, the Ariel Square Four 1000's price of around £800 made it accessible only to a select clientele, underlining its status as an aspirational motorcycle in the UK and abroad at the time. Its value also made it a sought-after choice for touring enthusiasts who desired smooth power for long distances.
Summary
The Ariel Square Four 1000, especially in its MK II form, represents a unique chapter in British motorcycle history. Its distinctive square-four engine, 1000 cc displacement, and 42 hp made it a flagbearer of innovation and performance. Marked by high manufacturing standards and a lasting mechanical presence, the Square Four model continues to attract attention from collectors and classic bike aficionados.