
Classic motorcycle head-to-head
Ducati 900 SD Darmah vs Harley-Davidson EL Knucklehead
Ducati 900 SD Darmah scores 83/100 overall against Harley-Davidson EL Knucklehead on 79/100. On the road: 70–57. As classics: 95–100. Overall result: Ducati 900 SD Darmah.


Photo: Triple-green · CC BY-SA 2.0
Harley-Davidson EL Knucklehead
The numbers
Category-by-category result
| Category | Ducati Darmah | Harley-Davidson Knucklehead | Advantage |
|---|---|---|---|
| road | |||
| PerformanceDirect comparison of power, acceleration and usable performance across the pre-1990 classic field. | 8 | 7 | Ducati Darmah |
| HandlingSteering, stability, weight and real-road manners. | 8 | 6 | Ducati Darmah |
| BrakingDirect comparison of real stopping ability without an age allowance. | 7 | 4 | Ducati Darmah |
| ReliabilityEngine, electrics and general dependability when properly maintained. | 6 | 5 | Ducati Darmah |
| Ease of ownershipMaintenance, parts supply and access to specialist knowledge. | 6 | 5 | Ducati Darmah |
| ComfortRiding position, vibration and suitability for longer journeys. | 7 | 7 | Level |
| classic | |||
| StylingDesign quality, visual presence and period appeal. | 10 | 10 | Level |
| Historical importanceInfluence on motorcycling and importance within its era. | 9 | 10 | Harley-Davidson Knucklehead |
| Collector appealLong-term desirability among classic motorcycle enthusiasts. | 9 | 10 | Harley-Davidson Knucklehead |
| CharacterSound, feel, personality and memorable riding experience. | 10 | 10 | Level |
Choose the Ducati Darmah if…
you want charismatic bevel-drive Ducati performance with more comfort and practicality than the 900 Super Sport.
Choose the Harley-Davidson Knucklehead if…
you want landmark Harley-Davidson engineering, exceptional visual character and one of America's most collectible motorcycles.
Background
History
Ducati Darmah
The Ducati 900 SD Darmah was produced from 1977–1982 and used a 864cc air-cooled bevel-drive V-twin. Within this comparison library it stands out particularly for styling, character, historic importance. It suits riders who value the qualities described in its original profile rather than choosing by specification alone.
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.
Interesting details
Did you know?
Ducati Darmah
- Its production span in this library runs from 1977 to 1982.
- The recorded engine description is: 864cc air-cooled bevel-drive V-twin.
- Its strongest comparison scores are styling, character, historic importance.
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.
Present-day appeal
Collector notes
Ducati Darmah
Collector interest is strongest where condition, originality and correct period details support the identity of the Ducati 900 SD Darmah. 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.
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.
Before you buy
Buying checks
Ducati Darmah
- 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.
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.
Period opposition
Historic rivals
Rivals to the Ducati Darmah
Rivals to the Harley-Davidson Knucklehead
Final result
The verdict
Ducati 900 SD Darmah wins the direct on-the-road comparison. Harley-Davidson EL Knucklehead wins the classic-motorcycle comparison. Ducati 900 SD Darmah takes the overall result after the road and classic scores are weighted equally.