Classic and Classy Motorcycles Ltd

Historical Context

The 1976 Triumph Bonneville T140V represents a critical point in British motorcycle history. It was the successor to the iconic T120 and was introduced as Triumph’s response to the rising dominance of Japanese bikes in the early to mid-1970s. With growing pressure from machines like the Honda CB750 and Yamaha XS650, Triumph expanded the engine capacity of its classic 650 twin to 744cc, birthing the T140 series. The T140V was the 5-speed variant and retained the character of the original Bonnevilles while introducing necessary updates. Despite being produced during a turbulent time for Triumph under Norton-Villiers-Triumph (NVT), the T140V remains one of the most loved British twins of the era—thanks to its looks, torque, and unmistakable exhaust note.

Technical Specifications and Performance

• Year: 1976
• Make: Triumph
• Model: Bonneville T140V
• Engine Displacement: 744cc
• Engine Type: Air-cooled OHV parallel twin
• Compression Ratio: 7.9:1
• Carburetion: Twin Amal concentric carburetors
• Ignition System: Points ignition (pre-electronic)
• Transmission Type: 5-speed manual
• Final Drive: Chain
• Cooling System: Air-cooled
• Fuel Capacity: Approx. 2.5 gallons
• Braking System: Disc front and rear (new for '76)
• Dry Weight: Approx. 395 lbs
• Top Speed: Around 110 mph

Technical Advancements

The T140V was a notable upgrade over the earlier T120s. The 5-speed gearbox gave the engine a broader cruising range, especially at motorway speeds. In 1976, Triumph also introduced a rear disc brake for the first time—a rare feature on British bikes and a significant improvement over the traditional drum setup. The switchgear and lighting were upgraded to meet US safety standards, and the twin Amal carburetors were revised for easier tuning. While the bike still used points ignition, the overall package was more refined and better suited for international markets.

Evolution of the Model

The Bonneville T140 would go through several versions over its production run—from the T140E with electronic ignition, to the T140D with mag wheels and styling changes, and later the electric start T140ES. But the 1976 T140V remains a favorite among purists for striking the right balance between modern upgrades and vintage British charm. Its kick-start-only operation and raw mechanical feel are part of what gives it character. For many, it’s the last truly classic Bonneville before emission regulations and shifting tastes forced bigger changes.

Competitors in the Market

In 1976, the Bonneville was up against increasingly advanced rivals like the Honda CB750, Suzuki GT750, and Kawasaki Z1. These bikes offered electric start, superior reliability, and smoother power delivery. Still, the Bonneville held its ground with its timeless styling, slim proportions, and torquey twin-cylinder engine. For riders who valued mechanical simplicity, home servicing, and a visceral riding experience, the T140V was still an attractive choice—especially in the UK and among vintage enthusiasts.

Legacy and Appeal

As a barn find, the 1976 Bonneville T140V offers a rewarding restoration opportunity. With strong parts availability and a passionate following, it’s a realistic project for classic bike enthusiasts. Once restored, it delivers a ride full of personality—lightweight, agile, and rich with British charm. The T140V holds its place as a true icon of the Meriden era and is often considered the last great Bonneville before Triumph’s original collapse in the early 1980s. For collectors and riders alike, it’s a piece of two-wheeled history worth bringing back to life.