West Coast Classics are proud to present this 1954 Austin-Healey
100-4 BN1 Roadster which are considered the definitive "first" of
the "Big Healeys," and celebrated for their pure design and
lightweight agility. Built September 10, 1954Chassis No.
BN1-L/219223Body No. 51642660cc inline 4-cylinder engineDual
carburetors3-speed manual gearbox with overdriveSmiths
instrumentationFactory heater option, Laminated windscreen, Miles
per Hour speedometerFinished in factory-correct Carmine Red
paintBlack upholstery with Red piping and Black carpets15-inch
knock-off wire wheelsFront and rear bumper guardsBritish Motor
Industry Heritage Trust CertificateWhat began as a joint venture
between Donald Healey and the British Motor Corporation (BMC) to
bridge the market gap between the affordable MG and the high-end
Jaguar was destined to become one of Englands truly iconic sport
cars! The car was to be named "100" because it was the
first Healey capable of breaking the 100 mph barrier and in 1953
the 100-4 set multiple land speed and endurance records at the
Bonneville Salt Flats, cementing its performance reputation in the
American market.The BN1 models were produced between May 1953 and
August 1955 before being replaced by the BN2.Technical
SpecificationsEngine: 2,660 cc (2.7L) Inline 4-cylinder OHV engine,
adapted from the Austin A90.Performance:Horsepower: 90 bhp @ 4,000
rpm.Torque: 144 ft-lbs @ 2,000 rpm.Top Speed: 106 mph (standard);
up to 111 mph with the windshield folded down for
aerodynamics.Acceleration: 060 mph in approximately 11.2
seconds.Transmission: A unique 3-speed manual with overdrive on the
top two gears. (Note: Technically a modified 4-speed where 1st was
often blocked out due to the engine?s high torque).Braking
& Suspension: Girling 11-inch drum brakes all round;
independent front suspension with coil springs and a rigid rear
axle with semi-elliptic leaf springs. Key FeaturesFolding
Windshield: One of its most iconic features, allowing the driver to
lay the screen flat for improved aerodynamics.Construction:
Aluminum and steel body panels over a steel frame.Optional "Le
Mans" Kit: Many owners retrofitted their cars with "M"
specifications, which included larger SU H6 carburetors,
high-compression pistons, and a louvered bonnet.The next generation
model was the BN-2 fitted with a 4 speed manual transmission and
still with overdrive on the top two gears. Other features that
distinguish the BN2 from the BN1 are the slightly larger front
wheel arches, different rear axle and being the first 100 with
optional two-tone paint.By January 1956 production was running at
200 cars each month and sales in California 150 cars each month
with the final BN2 built in July 1956.The high-performance 100M
model was introduced in 1955 with larger carburettors, a cold air
box to increase engine air flow, high-lift camshaft and 8.1:1
compression pistons and it produced 110 bhp at
4500 rpm. With a stiffened front suspension and the hood
louvres to distinguish it, along with a leather hood belt. Most of
the 100Ms were finished with a two-tone paint scheme, in all, only
640 100Ms were built by the factory.The 100M components (including
the high compression pistons) were also made available as the Le
Mans Engine Modification Kit, which could be retrofitted and
installed in either a BN1 or BN2 with the engine in situ, improving
the power output to approximately 100 bhp at
4500 rpm. The kit could be ordered from BMC, allowing
private owners to make their own modifications, but these are not
as valuable as any of the original 640 factory 100M?s. Only the
factory-registered chassis identification numbers can distinguish
the actual factory built originals from retrofitted models.Finally
and built primarily for racing, the aluminium-bodied "100S" (for
Sebring) model developed a phenomenal for its day 132 bhp
at 4700 rpm! Five works development/special test cars
carrying the "SPL" chassis number prefix were developed during 1953
and 1954, with one winning its class at Sebring in 1954 and
prompting the "S" designation. Only 50 production 100S cars were
made, hand built in Warwick and delivered between February -
November 1955 and carrying the "AHS" chassis number prefix.To
minimize weight and improve performance the cast iron cylinder head
was replaced by a Weslake designed aluminium one, and the overdrive
unit was not installed. Dunlop disc brakes were used all-round, the
world's first production car to feature them both front and rear.
To further lighten the vehicle, bumpers and hood (convertible top)
were eliminated, the grille reduced in size, and the windscreen
made of plastic. In all, weight was reduced by approximately
200 lb. The majority of 100Ss were two-toned white with
Lobelia Blue sides. A handful were produced in solid Spruce Green
and red, and a single one in black.
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