A red, 1974 Triumph Stag on display in the Stag owners Club zone of the 2016 Silverstone Classic
The Triumph Stag is a British car sold between 1970 and 1978 by the Triumph Motor Company, styled by Italian designer Giovanni initial Stag design was based around the saloon's six cylinder engine, but Harry Webster intended the Stag, large saloons and estate cars to use a new Triumph-designed overhead cam (OHC) fuel injected (PI) V8. Under the direction of Harry Webster's successor, Spen King in 1968, the new Triumph OHC PI V8 was enlarged to 2997 cc ( litres) to increase torque. To meet emission standards in the USA, a key target market, the troublesome mechanical fuel injection was dropped in favour of dual Zenith-Stromberg 175 CDSE carburettors. A key aim of Triumph's engineering strategy at the time was to create a family of engines of different size around a common crankshaft. This would enable the production of power plants of capacity between and 4 litres, sharing many parts, and hence offering economies of manufacturing scale and of mechanic training. A number of iterations of this design went into production, notably a slant four-cylinder engine used in the later Triumph Dolomite and Triumph TR7, and a variant manufactured by StanPart that was initially used in the Saab 99. The Stag's V8 was the first of these engines into production. Sometimes described as two four-cylinder engines Siamesed together, it is more correct to say that the later four-cylinder versions were half a Stag engine (the left half). It has sometimes been alleged that Triumph were instructed to use the proven all-aluminium Rover V8, originally designed by Buick, but claimed that it would not fit. Although there was a factory attempt by Triumph to fit a Rover engine, which was pronounced unsuccessful, the decision to go with the Triumph V8 was probably driven more by the wider engineering strategy and by the fact that the Buick's different weight and torque characteristics would have entailed substantial re-engineering of the Stag.
Size: 5365px × 3288px
Location: Silverstone Circuit, Towcester, Northamptonshire, NN12 8TN
Photo credit: © John Gaffen / Alamy / Afripics
License: Licensed
Model Released: No
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