Reference
Triumph Stag specifications and dimensions
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
The Stag sits on a shortened Triumph 2000 floorpan, and the wheelbase is the one dimension quoted consistently across sources. Published overall length, width, height and kerb weight vary between sources and by market and specification, so they are omitted here rather than approximated.
| Specification | Figure | Notes |
|---|---|---|
| Wheelbase | 100 in (2,540 mm) | Shortened Triumph 2000 floorpan |
Overall length, width, height and kerb weight omitted pending primary-source verification. Check the dimensions page of the owner's handbook or Workshop Manual for your own car.
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.