Dunhill's Motorities, as their store on the Euston Road was renamed, housed showroom, workshops, and offices, and supplied accessories to the manufacturers, chauffeurs and mechanics of the automotive trades. When Alfred took over, the business had already firmly established the standards that would later come to be, in the eyes of many, the beau ideal in men's personal luxury items. Ranging from heavy leather coats to helmets and goggles, and all else that was needed for protection in an open motorcar, in short order Dunhill became virtually synonymous with comfort and safety on the road. Accessories for the vehicle itself were also an important part of the Dunhill's Motorities range—car horns, dashboard clocks, motoring lamps, and trunks.

An infamous Dunhill product at the time was the Bobby Finder Goggles; an amusing name based on the slang for a policeman. In 1903 Alfred was caught and fined £1 for speeding at 22 ½ miles per hour. His reaction was to produce field glasses that looked like motoring goggles which could be worn in order to spot speed traps on the road ahead before they spotted you. In advertisement copy it was claimed that, "Dunhill's Bobby Finders will spot a policeman at half a mile even if disguised as a respectable man." By 1904, it was known as such an integral part of the motoring scene that the company won a gold medal for "automobilist's" clothing at Crystal Palace. "Everything but the Motor" was not only the Dunhill's Motorities' boast, but also a company rule Dunhill himself broke only once, with the inventive and rather curious Dunhill Tweenie motorcar in 1912.

Introduction of the Dunhill pipe was a logical step from Motorities, as in 1904 Alfred had already patented a "Windshield Pipe" to help a driver combat the effects of wind and weather in his open top car. In 1906 Dunhill's first tobacconist and pipe shop opened on Duke Street. Its proximity to the clubs of St. James's and Pall Mall helped to ensure instant success, and a distinguished and loyal customer base. The Duke Street shop gained a reputation for custom tobacco recipes, and by 1910 Alfred had developed a quality pipe at a price twice that of any other on the market.

During the First World War word spread amongst officers and men about the reputation of Dunhill, in both continental Europe and the USA, and by 1924 some 260,000 pipes a year were being sold through the Duke Street store. Alfred Dunhill summarised his retail philosophy in an article written in the summer of 1923:

My experience in the motorists' trade has convinced me that, if one can exactly meet the desires of a good class of public, time alone is necessary to make the business profitable. Compared with quality, price is relatively unimportant. If I were asked to put in a nutshell the reason for our success, I should say: because we have always had a shop in which we can put our goods to the customer's test hour by hour. The energy we might have expended in advertising to get new customers we devoted to pleasing in the highest degree those we had.

Success of the brand with the American consumer was such that, in 1921, an office was opened on Fifth Avenue at 42nd Street in New York. Following this, the first continental European store opened in 1924 at 15, Rue de la Paix in central Paris, where, along with the introduction of the "Unique lighter", the world's first one-handed pocket lighter debuted. Product range was widened to include dressing table sets, cutlery, clocks, bronzes, and picture frames in onyx, agate, and lapis.

Though with a somewhat shorter stylographic and pencil crafting history than some of its sister manufacturers, Dunhill entered the market with much the same alacrity and passion as demonstrated in other product arenas. The writing instrument was first introduced into the Dunhill collection in 1929, and came in the shape of a small, pocketsize calendar pencil. The calendar pencil was initially made available to customers in 9ct gold, 18ct gold, lacquer, and silver. Following the success of these pencils, Dunhill's consolidated its place in the chirographics market by introducing the Dunhill-Namiki pen in 1930. Produced using Japanese lacquer, a technique called maki-e was employed to give the pens their luxurious ornamentation.

By the mid-1930s, the Dunhill pen collection ranged from the duo-pen (fitted with two nibs for two colours of ink), the Desk Pen set (included holder, pen and ink), the calendar pencil, the Dunhill-Namiki pen, and the watch pencil (combination timepiece, with clock-face incorporated into the top of the pencil). From the 1930s to the present, Dunhill continued to produce high-quality, innovative and unique scrivening implements. This can be seen in collections such as the Gemline, Sidecar, AD 1800, and 2000.

In November 1933 the New York store moved to the British Empire Building in Rockefeller Center on 5th Avenue. Dunhill occupied five floors in total, selling a selection of merchandise including stationery, playing cards, picture frames, diaries, cocktail sets and bar accessories. Mary Dunhill, originally trained as a hairdresser, and later, as chairman of the company, pioneered a cosmetics and fragrance range in the USA in the early 1930s, including a fragrance called Escape which was introduced in 1943. Her success led to the introduction in 1934 of the first Dunhill men's fragrance, Dunhill For Men.

Before the outbreak of the Second World War, luxury materials and goods were obtained from the best European sources, including Vienna, France, Italy, Spain, and Bohemia. The range of different products available gave rise to the motto "there's always something new at Dunhill's." Also, from the Duke Street shop, during World War II, Carter, an employee since the age of 12, delivered George VI's tobacco to Buckingham Palace, as well as keeping Winston Churchill regularly supplied with his favourite cigars. After the war, Carter received the MBE for these actions, and continued working for Alfred for another 50 years. At 3 o'clock in the morning on 17th April 1941 two German land mines scored a direct hit on Dunhill's at Jermyn Street. Virtually everything was destroyed, but Alfred H. Dunhill managed to personally open again for business on the very same day.

Over the next half century, Alfred Dunhill's became one of the foremost personal luxury goods purveyors, with locations in the furthest reaches of modern society. At the dawn of the 21st Century, new Dunhill emporiums opened their doors at 21 Old Bond Street in London, Namiki Dori in Tokyo, and on Fifth Avenue in New York. Dunhill pens—such as the Torpedo and Revolette Multi-Function collections—and pencils bear the legacy marks of Dunhill Motorities, and of the explicitly men's-oriented personal luxury accessories, continuing the tradition of absolute excellence, begun by Alfred Dunhill himself, those many long years ago, first in Euston Road, and then in Duke Street, London.

Proclaiming the very core of the Dunhill aesthetic, the new Sentryman Collection is in truth a set of four distinct collections of exquisite chirographic implements, together with complimenting accessories: supremely masculine, inviting feminine touch; and refined engineering that beckons 21st century man to once again seek intimate acquaintance with his own thoughts and feelings, as only ink put to paper, by hand, can express. With a silhouette inspired by the historic English Pillar Box, the first “mail box” of the British Empire, the heart of the collection is sleek, black resin, that can go anywhere, trimmed in either gold or white metals, giving greatest choice of fountain, roller, ballpoint, and pencil; the eminently contemporary woven, carbon fibre, with platinum detailing, offers fountain and roller; Art Deco is conjured in the diamond-patterned, all-metal roller and ball pens; and la gloire suprêmee is the formal dress limited edition, with 112 diamonds set in the crown, Swarovski crystal-covered barrel and cap, in fountain pen exclusively, and only 112 being crafted for availability worldwide.