1977 Triumph TR 7 Coupe Dimensions, Size & Specs

The Triumph TR7 Coupe weighs approximately 1000 kg (2205 lbs) curb weight, which is relatively light for a sports coupe of its era. This light weight helped enhance the car’s performance by improving acceleration, handling, and fuel efficiency. The reduced mass allows the 4-cylinder engine to deliver spirited driving dynamics, making the TR7 a nimble and responsive vehicle on twisty roads.

The standard tire size on the Triumph TR7 Coupe is 175/70 R13, paired with 5.5J x 13 rims. This rim size and tire profile were typical for sporty coupes in the late 1970s, offering a balance between ride comfort and grip. The 13-inch wheels complemented the car’s relatively compact dimensions and contributed to its sharp handling characteristics.

The Triumph TR7 Coupe has an overall height of 1254 mm (49.4 inches or about 4.1 feet). While explicit ground clearance data is less commonly cited, the relatively low height plays a crucial role in the car’s sporty stance and aerodynamic efficiency. The coupe's low height helps in reducing air drag and lowering the center of gravity, both factors that positively influence handling and stability at higher speeds.

Yes, the Triumph TR7 Coupe can comfortably fit into a standard garage. Typical residential garages are at least 2400 mm (about 7 feet 10 inches) in width and 2100 mm (around 6 feet 11 inches) in height, so the TR7’s dimensions—4065 mm length, 1681 mm width, and 1254 mm height—are well within average garage size limits. Its compact size makes it suitable for most home garages, making parking and storage convenient for owners.

The Triumph TR7 Coupe did not have a direct predecessor with a similar wedge design, but it followed the earlier Triumph TR6 which was larger and more traditionally styled. The TR7 is shorter in length (4065 mm vs. TR6’s about 4175 mm), noticeably narrower (1681 mm vs. around 1676 mm) and lower in height (1254 mm vs. roughly 1300 mm). This shift resulted in a more compact, modern wedge shape that emphasized aerodynamic styling and a fresh design direction compared to the muscular and classic lines of the TR6.

While official interior dimensions are not widely documented, the TR7 Coupe’s compact exterior translates into a snug cabin space typical of sports coupes of the era. It comfortably accommodates two adults with a reasonably sized luggage compartment. The low roofline influences headroom, which might be somewhat restricted for taller occupants. Despite its compactness, the TR7 delivers a driver-focused cockpit with an emphasis on ergonomics and sportiness.

The TR7’s width of 1681 mm (66.2 inches) combined with 175/70 R13 tires mounted on 5.5J x 13 rims provides a balanced footprint for handling and grip. The moderately narrow width helps the car slice through traffic with ease, while the tire size offers good traction for spirited driving on winding roads. Together, these dimensions contribute to the TR7's reputation for agile cornering and responsive steering, although by modern standards the tire width is fairly modest.

In comparison to contemporaries like the Ford Capri or Datsun 280ZX, the Triumph TR7 Coupe is generally more compact and lighter. For instance, the Ford Capri was longer (around 4386 mm) and heavier (over 1100 kg), while the Datsun 280ZX was larger still. The TR7’s smaller size at 4065 mm length, narrower width, and curb weight of 1000 kg made it more nimble but with less cabin space. This positioned the TR7 as an agile and affordable sports coupe focusing on sharp handling rather than outright size or power.

The Triumph TR7 Coupe's most distinctive design feature is its wedge-shaped body with sharply angled front and rear ends, pioneered by Harris Mann. This design was avant-garde for the late 1970s and contributed heavily to the car’s compact dimensions and low height of 1254 mm. The angular lines minimize frontal area to improve aerodynamics, while the short rear overhang and flush-mounted glass surfaces reinforce the sporty, modern look. These stylistic choices directly influenced its overall size and stance.