Classic and Classy Motorcycles Ltd

Historical Context

The 1969 Triumph Trident T150 750cc was Triumph’s ambitious leap into the multi-cylinder performance world, marking a significant shift from the company's traditional twin-cylinder designs. Developed alongside the BSA Rocket 3, the Trident featured a three-cylinder engine that offered smoother power delivery and higher performance than its twin-cylinder predecessors. Its release was strategically timed to compete with the emerging threat from Japan—particularly Honda’s game-changing CB750, which debuted the same year. While the Trident had the advantage of earlier development and racing pedigree, Honda's electric start and overhead cam design soon outshone the British triple. Nevertheless, the T150 remains a bold and innovative entry in Triumph’s lineup, embodying both the height and the beginning of the end of the classic British motorcycle industry.

Technical Specifications and Performance

• Year: 1969
• Make: Triumph
• Model: Trident T150
• Engine Displacement: 740cc
• Engine Type: Air-cooled OHV inline triple
• Compression Ratio: 9.0:1
• Carburetion: Triple Amal Monobloc carburetors
• Ignition System: Points ignition (distributor-style)
• Transmission Type: 4-speed manual
• Final Drive: Chain
• Cooling System: Air-cooled
• Fuel Capacity: Approx. 4.0 gallons
• Braking System: Drum front and rear (early models)
• Dry Weight: Approx. 465 lbs
• Top Speed: Around 120 mph

Technical Advancements

The T150’s main innovation was its 740cc triple-cylinder engine—a rare configuration in the British motorcycle world. This layout delivered a blend of torque and smooth revving character that twins struggled to match. The engine featured three separate carburetors, one for each cylinder, and produced over 58 horsepower—impressive for the time. It was also equipped with a 3-into-2 exhaust and a racing-derived camshaft profile. While the 4-speed gearbox was considered a bit dated, the bike’s top speed and high-revving nature made it competitive on the road and track. Triumph eventually added a 5-speed gearbox and disc brakes in later models, but the 1969 original remains iconic for its raw and unfiltered performance.

Evolution of the Model

The T150 series evolved steadily throughout the early 1970s, gaining improvements like a 5-speed transmission (T150V), disc front brakes, and eventually the redesigned T160 with electric start and slanted engine configuration. The early T150s, like the 1969 model, are prized for their purity and aggressive styling. They feature unique elements like “ray gun” silencers, the “breadbin” fuel tank, and twin leading shoe front brakes. Though the Trident never outsold the Japanese rivals, it earned respect in endurance racing and TT events—further cementing its place in history.

Competitors in the Market

In 1969, the T150 faced strong competition from the just-released Honda CB750, as well as the Norton Commando 750 and BMW R75/5. While the Honda offered electric start, disc brakes, and greater refinement, the Triumph Trident countered with a unique sound, impressive top-end performance, and British charm. It appealed to riders who wanted something different—faster and more exotic than a twin, but still built with a spanner in mind.

Legacy and Appeal

Today, the 1969 Triumph Trident T150 is one of the most collectible and revered British triples ever made. As a barn find or restoration project, it offers an exciting challenge with high rewards. Its unique triple-cylinder design, racing lineage, and historical importance give it a strong following among classic bike enthusiasts. Once restored, a T150 delivers thrilling power delivery, unmistakable sound, and true vintage presence—perfect for shows, spirited rides, or just appreciating a bold piece of motorcycle history.