Classic and Classy Motorcycles Ltd

1973–1983 Triumph Bonneville T140 Valuation Report

Date: March 2025

Historical Context and Evolution

The Triumph Bonneville T140, produced from 1973 to 1983, was designed to compete against Japanese motorcycles. Featuring a 744cc parallel-twin engine producing 53 horsepower, it offered speeds up to 110 mph. The model underwent several refinements, including a left-side gear shift and rear disc brake for enhanced performance.

Valuation Analysis

Market value varies based on condition:

• Project Condition: Non-running examples needing restoration sell for £3,000 to £4,000. (Source)
• Roadworthy Condition: Operational motorcycles with minor wear range from £4,000 to £6,000. (Source)
• Restored/Mint Condition: Well-preserved or fully restored models command £7,000 to £9,000. (Source)

Factors Influencing Value

• Originality: Bikes with factory specifications are more desirable.
• Provenance: Service records and ownership history increase value.
• Market Trends: Prices fluctuate based on collector demand.

Conclusion: The T140 remains an iconic British motorcycle with strong market interest. Buyers should assess originality and mechanical condition when making a purchase.

All Valuations