What is the engine displacement of the Henderson HP Four?

The Henderson HP Four has an engine displacement of 934.0 ccm (56.99 cubic inches).

What is the top speed of the Henderson HP Four?

The Henderson HP Four has a top speed of 97.0 km/h (60.3 mph).

Henderson HP Four Price, Specs, Review

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Review

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The Henderson 7 HP Four (1912) represents an early example of motorcycle engineering, featuring a 934cc four-cylinder engine. This engine configuration was relatively advanced for its time, providing smoother power delivery than single or twin-cylinder alternatives. With a top speed of 97 km/h (60 mph), it was considered a fast and capable machine for the era. The design of the 7 HP Four reflects the motorcycle technology of the early 20th century. The expanding brake (drum brake) on the front wheel provided the primary means of stopping, showcasing the limitations of braking systems at the time. The motorcycle's overall construction emphasizes simplicity and robustness, prioritizing reliability over advanced features. Targeted towards motorcycle enthusiasts and those seeking a powerful and reliable machine, the Henderson 7 HP Four played a significant role in the development of early motorcycle technology. Its four-cylinder engine and relatively high top speed made it a desirable option for riders seeking performance and touring capabilities.

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Pros (Advantages)

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✅ Why buy this bike?

• The 934cc inline-four engine provides smooth, tractable power for comfortable touring and highway cruising. • Robust construction and engineering from Henderson in 1934 ensures inherent durability and longevity if maintained. • The HP Four's distinctive engine sound and visual presence offer a unique, classic American motorcycle experience. • Its long wheelbase and low center of gravity contribute to excellent stability at speed and on open roads. • A relatively low compression ratio makes it tolerant of varying fuel quality, a benefit for vintage machines. • The large displacement for its era offers impressive torque delivery, making it easy to ride without constant gear changes.

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Cons (Disadvantages)

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⚠️ Things to consider

• Lack of modern braking technology makes stopping distances significantly longer and requires more rider effort. • Limited suspension travel and basic damping provide a harsh ride, especially on rough or unpaved roads. • The large, heavy engine and frame make low-speed maneuvering and parking a physically demanding task. • Parts availability for such an antique model is extremely scarce and often requires custom fabrication or expensive reproductions. • Fuel economy is poor by modern standards, and the original carburetor design can be finicky to tune. • No electric start means reliance on a kickstarter, which can be challenging and tiring for some riders.

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License Class (EU)

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Rule of thumb: under 125cc / 15HP → A1, under 47HP → A2, above → A.

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Fuel Economy & Running Costs

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Estimated average for 934cc class: 35-50 mpg (5.0-7.0 L/100km)

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Insurance Class

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Insurance grouping for Henderson HP Four (934cc):

📋 Group 15-20+ — performance class, higher premiums

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Insurance Calculator (UK est.)

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Personalised premium estimate for the Henderson HP Four (UK rates):

💡 Estimate based on UK market averages. For real quotes, compare on Compare the Market, MoneySuperMarket, GoCompare.

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Buy New & Used

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Find new and used Henderson HP Four listings:

🛒 eBay Motors 🏍️ Cycle Trader 🇬🇧 Auto Trader UK 🔍 Google Listings

💡 Third-party listings. MotoBike Info is informational only.

👤 Final premium varies by rider age, history, location.

Henderson HP Four

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