Though an eccentric and unorthodox design, the Trojan was remarkably long-lived. Leslie Hounsfield's original prototype ran in 1913 and the final van versions were still in production well after the Second World War with those built from 1923 to 1928 made under agreement by Leyland.

The two stroke engine with two paired cylinders and epicyclic gearbox was housed under the front seat. Final drive was by chain to the solid rear axle.

The punt type chassis frame was suspended on very flexible cantilever springs which, according to the designer, rendered pneumatic tyres unnecessary so Trojans rode on solid tyres. All this added up to extremely cheap motoring and the company's slogan was "can you afford to walk?"