Triumph T140E Power and Performance

The Triumph T140E holds a special place in the history of British motorcycles. Emerging in the late 1970s, a period when factory customisation was gaining significant traction, Triumph responded to the market's desires by producing their own take on the custom scene, based on the T140E model. This move aimed to capture the attention of riders looking for a stylish, ready-to-go custom machine straight from the manufacturer.

Understanding the Triumph T140E's Power Output

When discussing the performance of a motorcycle, understanding its power and torque figures is crucial. These metrics provide a clear indication of how the bike will perform under various riding conditions. The Triumph T140E, a significant model for the brand during a transitional period, boasts specific power and torque figures that defined its character.

Maximum Power: A Closer Look

The Triumph T140E is rated with a maximum power output of 50.2 PS (Pferdestärke, the German unit for horsepower), which equates to approximately 49.5 bhp (brake horsepower) or 36.9 kW (kilowatts). This peak power is achieved at 6500 revolutions per minute (rpm). This figure, while perhaps not earth-shattering by modern standards, was respectable for its class and era. It provided the T140E with enough 'oomph' for enjoyable road riding, cruising, and spirited acceleration.

The distinction between PS, bhp, and kW is important to note. While all measure power, they use different scales and definitions:

• PS (Pferdestärke): A European metric, often slightly higher than bhp.
• bhp (brake horsepower): The traditional British unit, measured at the crankshaft.
• kW (kilowatts): The standard SI unit for power, increasingly used globally.

The fact that Triumph provided these figures highlights their commitment to transparency regarding the machine's capabilities. The power delivery at 6500rpm suggests a character that enjoyed being revved a little, characteristic of many parallel-twin engines of that era.

Maximum Torque: The Pulling Power

Complementing the power output is the maximum torque figure. Torque is essentially the rotational force produced by the engine, often described as the 'pulling power'. The Triumph T140E produces a maximum torque of 56.7 Nm (Newton-metres), which is equivalent to 41.8 ft-lbs (foot-pounds). This peak torque is delivered at 5500rpm.

A lower rpm for peak torque often translates to stronger acceleration from lower speeds and a more flexible engine. The T140E's torque curve would have provided a satisfying surge of power when the throttle was opened, making it a responsive and engaging ride. The combination of its power and torque meant the T140E was capable of highway cruising and enjoyable acceleration out of corners.

The 'E' Designation: What Does It Mean?

The 'E' in T140E typically signifies an updated or specific variant. In Triumph's history, this often denoted improvements or changes to the original design. For the T140E, it often referred to models featuring electronic ignition, a significant upgrade from older points-based systems. Electronic ignition offers improved reliability, easier starting, and more consistent performance across the rev range. This was a crucial technological step for motorcycles in the late 70s and early 80s.

Triumph's Factory Custom Approach

In the late 1970s, the trend of 'factory customs' was booming. Manufacturers began offering models that were already modified with custom paintwork, upgraded exhaust systems, and other cosmetic or performance enhancements directly from the factory. This appealed to riders who wanted a unique-looking bike without the hassle or expense of aftermarket modifications. Triumph, keen to stay competitive and cater to evolving customer tastes, embraced this trend by producing their own factory customs based on the T140E.

These factory custom T140E models were typically distinguished by:

• Special paint schemes: Often more elaborate and eye-catching than standard models.
• Chrome detailing: Enhanced chrome components for a more premium look.
• Custom exhausts: Sometimes featuring louder or more performance-oriented silencers.
• Comfortable seating: Often featuring custom seats for improved rider comfort and style.

This strategy allowed Triumph to leverage the existing T140 platform while offering a fresh, appealing package that resonated with the customisation culture of the era. It was a smart move to keep the Bonneville lineage relevant and desirable.

Triumph T140E vs. Other Models

To put the T140E's performance into context, it's useful to compare it briefly with other Triumph models or contemporaries. The T140 series itself evolved from earlier T120 models, with the T140E being part of the Bonneville lineage. While earlier Bonnevilles were known for their raw power and character, the T140E represented a more refined and modern iteration, incorporating updates like the aforementioned electronic ignition and often disc brakes.

Compared to some Japanese rivals of the time, the T140E might have produced slightly less peak horsepower, but it offered a distinct character, a classic British twin sound, and a riding experience that many found more engaging. The torque delivery was often more accessible at lower revs, making it a pleasant machine for everyday use.

Table: Triumph T140E Performance Specifications

This table summarises the key performance figures that define the T140E's capabilities.

Riding Experience and Legacy

The Triumph T140E, particularly in its factory custom guises, offered a blend of classic British motorcycle charm and a touch of modern flair. The parallel-twin engine provided a characteristic thrum and sound that was instantly recognisable. While not the fastest bike on the block, its charm lay in its style, its heritage, and the engaging riding experience it offered.

The factory custom approach meant that owners could enjoy a bike that already stood out from the crowd. These machines became popular for cruising, weekend rides, and as stylish commuters. Their legacy is tied to a period of transition for Triumph, showcasing the company's efforts to adapt to changing market trends while staying true to its iconic Bonneville identity.

Frequently Asked Questions about the Triumph T140E

Q1: What is the top speed of a Triumph T140E?
A1: While specific top speed figures can vary depending on the condition of the bike, rider weight, and gearing, the T140E was generally capable of speeds in the region of 100-110 mph (160-177 km/h).

Q2: Was the T140E a reliable motorcycle?
A2: The T140E, with its electronic ignition, was generally more reliable than earlier Triumph models that used points ignition. However, like many motorcycles of its era, maintenance and regular servicing were key to ensuring optimal performance and longevity.

Q3: What made the T140E a 'custom' bike?
A3: Triumph offered specific 'factory custom' versions of the T140E. These featured unique paint schemes, enhanced chrome, different exhaust systems, and often upgraded seats, all fitted at the factory to give it a bespoke look.

Q4: How does the power of the T140E compare to modern motorcycles?
A4: The 50.2 PS (approx. 49.5 bhp) output of the T140E is significantly less than most modern 600cc or 750cc motorcycles, which often produce well over 100 bhp. However, the T140E's performance is judged within the context of its era and its classic character.

Q5: What engine configuration does the Triumph T140E have?
A5: The T140E is powered by a 744 cc (approximately) air-cooled, parallel-twin engine.

In conclusion, the Triumph T140E, with its 50.2 PS power output and 56.7 Nm of torque, represented Triumph's successful foray into the factory custom market of the late 1970s. It combined classic Bonneville character with modernising updates, offering riders a stylish and engaging machine that captured the spirit of its time.

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