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Rational (Heatley-Gresham)

British car built between 1901 and 1906

The Rational was a British car built between 1901 and 1906 in Royston, Hertfordshire. It was an 10 hp light car, with a 2281 cc, two-cylinder engine, it had a 2-speed gearbox and chain-drive built by Heatley-Gresham Engineering Co. Ltd. Fifteen Rational Taxis already in use in London in 1907.2 Wikipedia text CC BY-SA 4.0

Last updated Oct 21, 2026.

Overview

  • Industryautomotive industry1

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Rational Taxi (1907)
Photo: Operation & maintenance v.2 1907, Public domain, via Wikimedia Commons3

The Rational was a British car built between 1901 and 1906 in Royston, Hertfordshire. It was an 10 hp light car, with a 2281 cc, two-cylinder engine, it had a 2-speed gearbox and chain-drive built by Heatley-Gresham Engineering Co. Ltd.. Fifteen Rational Taxis already in use in London in 1907.2

Sources

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