Bentley 4 1/2 litre
Car : Bentley 4 1/2 litre
Year : 1929
Engine : 4 cylinders in line
Bore and stroke :100×140 mm
Cylinder capacity : 4396 cc
Gears : 4 forward
Brake horse power : 100
Maximum speed : 92 mph
Wheelbase : 10 ft 10 ins (3.30 m)
Suspension : front and back: semi- elliptic leaf- springs

Car : Bentley 3 litre
Year : 1921
Engine : 4 cylinders in line
Bore and stroke :80×149 mm
Cylinder capacity : 2996 cc
Gears : 4 forward
Brake horse power : 70
Maximum speed : 80 mph
Wheelbase : 9 ft 9½ ins (2.98 m)
Suspension : front and back: semi- elliptic leaf- springs
This is without question one of the most prestigious English makes of car, not only by virture of its quality and racing results, but also of the character of the founder and chief designer of the firm, Walter Owen Bentley himself. A contemporary of Ettore Bugatti, Bentley was an expert mechanic, having attended a mechanical engineering course with the Great Northern Railway. During his formative years he was first attracted to trains, and then motorbikes. He finally discovered his true vocation when he and his brother took over an agency of French cars (D.F.P. and La Licorne) in England.

Born in London in 1888. Bentley joined the Navy in the war, and met F. T. Burgess, the designer of the Humber. The first, authentic Bentleys were mechanical jewels, but their designer-maker had no real factory and was dependent on various suppliers, and his name became associated not only with high quality, but also with late delivers.
He was one of the first people to believe in races as a form of advertising, and in fact his cars raced with considerable success. Suffice it to mention the five victories at Le Mans, in the 24 Hours–four of those victories consecutive (1927-1930). The first Bentley, a 3-litre, was delivered to its owner in 1921. It had a five-year guarantee. The 3-litre stayed in production until 1939, and 1,630 were built in all. Despite the high cylinder capacity, the engine had 4 cylinders and 4 valves (2 inlet, 2 exhaust), with overhead camshaft, and magneto ignition. It only acquired front wheel brakes in 1924, which was the year that Duff and Clement won for the first time at Le Mans.