AI
Triumph
3TA
Classic · 349 cc
For sale now4 motorcycles
- Engine
- 349 cc
- Power
- 19 hp
- Weight
- 154 kg
- Price range
- €3,150 – €6,150
- Avg. mileage
- 2,315 km
- Common year
- 1967 · 3 motorcycles
This text was partly made with AI and may contain errors.
What should you pay for a 3TA?
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This is a guide based on asking prices, not confirmed sale prices.
Price trend+36%
Based on price data from 4 of the past 12 months.
Used prices are trending up: the typical asking price is €1,250 higher than in July 2026.
Model family
3TA at a glance
Quick reference values. Model year, generation and trim can differ.
Displacement
349 cc
Power
19 hp · 14 kW
Torque
24 Nm
Category
Classic
Specifications
- Displacement
- 349 cc
- Power
- 19 hp · 14 kW
- Torque
- 24 Nm
- Weight
- 154 kg
- Seat height
- 760 mm
- Fuel capacity
- 13.6 l
- Top speed
- 130 km/h
- Production
- 1957 – 1966
- Category
- Classic
Comparable models
Also worth considering
Models in the same category and price range to consider alongside the 3TA.
Generations and editions
Features and handling differ by generation. Use this overview to find the right version.
1 variants
Years
1957 - 1966
Triumph 3TA
GenerationThe 1957–1966 Triumph 3TA is the 349 cc 'Twenty One' parallel twin with nacelle-style front and simple classic engineering. Check engine numbers, oil tightness, ignition and charging, frame and forks, plus brakes, tyres and the quality of any restoration.
349 cc19 hp2 cyl.
About this model
About the Triumph 3TA
The Triumph 3TA, also called Twenty One, is a British 349 cc unit-construction parallel twin introduced in 1957. Engine and gearbox share one casing, then an important step for Triumph's smaller twins. Early fully enclosed 'bathtub' bodywork aimed to look modern and reduce maintenance; later examples adopted conventional mudguards and side panels. With roughly 18–20 hp, four speeds and modest mass, the 3TA was intended for commuting and gentle touring.
Today the 3TA is a charming classic, but correct year and body style identification matter. Many bathtub panels were removed historically and are now scarce. Check sludge trap/crankshaft oiling, oil return, primary chain, clutch and gearbox. Electrics and ignition are often modernised; judge quality and documentation. Inspect frame, tank and matching engine/frame numbers. A complete original Twenty One is worth more than a generic converted lightweight Triumph.
- Category
- Classic
- Production
- 1957 – 1966
- Power
- 19 hp
- Weight
- 154 kg
Before you buy
What to check before buying
- Verify engine/frame numbers and bathtub or later specification.
- Check sludge trap, oil return and wet sumping.
- Inspect primary chain, clutch and gearbox.
- Assess rare bodywork, ignition and wiring for quality.
Frequently asked questions
Frequently asked questions about the Triumph 3TA
What does a used Triumph 3TA cost?
A used Triumph 3TA costs €4,750 on average. Most cost €3,150 to €6,150. This is based on 4 motorcycles for sale now.
How many used Triumph 3TA are for sale?
MotorMonitor now compares 4 used Triumph 3TA motorcycles from Dutch sales sites.
What year and mileage does an average used Triumph 3TA have?
The average used Triumph 3TA is from 1967 and has done about 2,315 km.