Photo: Triple-green · CC BY-SA 2.0
Harley-Davidson EL Knucklehead
79/100 Overall
57 On the road100 As a classic
Classic motorcycle head-to-head
Harley-Davidson EL Knucklehead vs Triumph Bonneville T120
Harley-Davidson EL Knucklehead scores 79/100 overall against Triumph Bonneville T120 on 82/100. On the road: 57–65. As classics: 100–98. Overall result: Triumph Bonneville T120.
Triumph Bonneville T120
82/100 Overall
65 On the road98 As a classic
The numbers
Category-by-category result
| Category | Harley-Davidson Knucklehead | Triumph Bonneville | Advantage |
|---|---|---|---|
| road | |||
| PerformanceDirect comparison of power, acceleration and usable performance across the pre-1990 classic field. | 7 | 6 | Harley-Davidson Knucklehead |
| HandlingSteering, stability, weight and real-road manners. | 6 | 8 | Triumph Bonneville |
| BrakingDirect comparison of real stopping ability without an age allowance. | 4 | 5 | Triumph Bonneville |
| ReliabilityEngine, electrics and general dependability when properly maintained. | 5 | 6 | Triumph Bonneville |
| Ease of ownershipMaintenance, parts supply and access to specialist knowledge. | 5 | 8 | Triumph Bonneville |
| ComfortRiding position, vibration and suitability for longer journeys. | 7 | 6 | Harley-Davidson Knucklehead |
| classic | |||
| StylingDesign quality, visual presence and period appeal. | 10 | 10 | Level |
| Historical importanceInfluence on motorcycling and importance within its era. | 10 | 10 | Level |
| Collector appealLong-term desirability among classic motorcycle enthusiasts. | 10 | 9 | Harley-Davidson Knucklehead |
| CharacterSound, feel, personality and memorable riding experience. | 10 | 10 | Level |
Choose the Harley-Davidson Knucklehead if…
you want landmark Harley-Davidson engineering, exceptional visual character and one of America's most collectible motorcycles.
Choose the Triumph Bonneville if…
you value lightness, accessible mechanical simplicity and the sound and feel of a classic British twin.
Background
History
Harley-Davidson Knucklehead
The Harley-Davidson EL Knucklehead was produced from 1936–1940 and used a 989cc air-cooled overhead-valve V-twin. Within this comparison library it stands out particularly for styling, historic importance, collector appeal. It suits riders who value the qualities described in its original profile rather than choosing by specification alone.
Triumph Bonneville
The Triumph Bonneville T120 was produced from 1959–1973 and used a 649cc air-cooled parallel twin. Within this comparison library it stands out particularly for styling, historic importance, character. It suits riders who value the qualities described in its original profile rather than choosing by specification alone.
Interesting details
Did you know?
Harley-Davidson Knucklehead
- Its production span in this library runs from 1936 to 1940.
- The recorded engine description is: 989cc air-cooled overhead-valve V-twin.
- Its strongest comparison scores are styling, historic importance, collector appeal.
Triumph Bonneville
- Its production span in this library runs from 1959 to 1973.
- The recorded engine description is: 649cc air-cooled parallel twin.
- Its strongest comparison scores are styling, historic importance, character.
Present-day appeal
Collector notes
Harley-Davidson Knucklehead
Collector interest is strongest where condition, originality and correct period details support the identity of the Harley-Davidson EL Knucklehead. Its library score for styling 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.
Triumph Bonneville
Collector interest is strongest where condition, originality and correct period details support the identity of the Triumph Bonneville T120. Its library score for styling 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
Harley-Davidson Knucklehead
- 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.
Triumph Bonneville
- Confirm the frame and engine identity match the advertised model and year.
- Check cold starting, smoke, oil leaks and unusual mechanical noise.
- Check vibration-related fasteners, primary drive condition and signs of persistent oil leakage.
- 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 Harley-Davidson Knucklehead
Rivals to the Triumph Bonneville
Final result
The verdict
Triumph Bonneville T120 wins the direct on-the-road comparison. Harley-Davidson EL Knucklehead wins the classic-motorcycle comparison. Triumph Bonneville T120 takes the overall result after the road and classic scores are weighted equally.