Reference
Specifications
Factory specifications for the Triumph Stag (1970–1977). Every figure below is drawn from the archive. Where a figure is not verified from a primary source, it is omitted rather than estimated.
Engine
Triumph's own 3.0-litre V8 — 90°, single overhead camshaft per bank, cast-iron block with aluminium heads.
| Specification | Figure | Notes |
|---|---|---|
| Type | Triumph 90° V8, SOHC per bank | |
| Capacity | 2,997 cc | |
| Bore × stroke | 86.0 × 64.5 mm | Oversquare |
| Block | Cast iron | |
| Cylinder heads | Aluminium alloy | |
| Compression ratio | 8.8 : 1 | |
| Fuel system | Twin Zenith-Stromberg 175 CDSE carburettors | |
| Maximum power | 145 bhp @ 5,500 rpm | |
| Maximum torque | 170 lb·ft @ 3,500 rpm | |
| Engine character | Interference |
Factory redline figure omitted pending primary-source verification.
Transmission
| Specification | Figure | Notes |
|---|---|---|
| Manual gearbox | 4-speed manual | Laycock overdrive available on top gears (option) |
| Automatic gearbox | Borg-Warner 3-speed automatic (option) | |
| Drive | Rear-wheel drive |
Specific gearbox and axle ratios omitted pending verification.
Chassis & running gear
| Specification | Figure | Notes |
|---|---|---|
| Floorpan lineage | Derived from the Triumph 2000 saloon | |
| Body style | Four-seat convertible with fixed T-bar roll hoop |
Suspension type, brake specification and steering type omitted pending primary-source verification, rather than estimated here.
Performance
Contemporary factory performance figures (top speed, 0–60 mph, standing quarter mile) will be added here once verified against a primary source. They are deliberately omitted rather than estimated.
Dimensions & weight
Length, width, height, wheelbase, track and kerb weight will be listed here from the factory data. They are omitted pending verification rather than approximated.
Production
| Specification | Figure | Notes |
|---|---|---|
| Years of production | 1970 – 1977 | |
| Total built | 25,939 | |
| Estimated survival rate | ~46% | |
| Assembly | Canley, Coventry |
UK / export / US split omitted pending verification against Stag Owners Club or factory records.
Editorial policy: figures on this page are verbatim from documented sources. Nothing is rounded, estimated or reconstructed. Missing rows will be filled in as sourced material is added to the archive.