Alvis introduced a new model range in 1953, the TC21. Although it directly replaced the similar TA21 a high performance version of the new car was also added, the TC21/100 Grey Lady. The Grey Lady was instantly recognised by its sporty wire wheels and discreet bonnet "scoops" which protruded just aft of the radiator grille.
The "/100" part of the name made reference to the models 100bhp power output which came courtesy of a pair of twin carburettors and a higher compression ratio. The 100bhp also made sure that the Grey Lady could easily each the (then) magical top speed of 100mph. Production of the Grey Lady lasted until 1955.