Rational (Heatley-Gresham)

Rational Taxi (1907)

The Rational [1] 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.

Technical data

  • 110 mm (4.3 in) x 120 mm (4.7 in) bore and stroke
  • 10 HP at 900 Revolution per minute
  • two Speed gearbox
  • Top Speed in First Gear 6 Miles an Hour
  • Top Speed in Second Gear 18 Miles an Hour

References

  1. ^ "Rational". Operation & maintenance v.2 1907. 1907-01-01. Retrieved 2025-09-26.

Notes

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