This system quickly became obsolete as an estimate of the power produced by the engine, but it continued to be relevant as a way to classify cars for tax purposes.
They returned to the 10 tax horsepower market in 1934; this model was replaced in 1937 by a "Flying Ten" that lasted until the outbreak of World War II.
Standard again returned to the 10 tax horsepower market in 1954 with another Ten, which was supplemented in 1957 by an up-market version called the Pennant.
The side-valve 1267 cc long stroke (100 mm) engine had a single Zenith carburettor and could produce 33 bhp (25 kW) at 4000 rpm.
[8] It was among the first small British estate cars to have rear-passenger doors (like the saloon, and unlike its rivals such as the Ford Squire and Hillman Husky which used the two-door "van" arrangement).
[13] In 1955, supported by an inscrutable handicapping régime favouring small cars, a factory-prepared Standard Ten, driven by Jimmy Ray and Brian Horrocks, won the UK's RAC Rally.
[14] For the United States export market the car was badged as the Triumph 10[7] and in Scandinavia it was sold as the Standard Vanguard Junior.
[15] A tail-finned (with optional two-tone paint schemes) version of the Ten, the Standard Pennant was launched in October 1957.