Austin-Healey 100/4 BN1 Sports Car

                                           1953-55 Austin Healey 100

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     The Nash-Healey was a two seater sports car marketed specifically in the US during the period 1951 to 1954.

     It was, in fact, the first post WW2 convertible to be manufactured in the US, and was a joint venture between Nash-Kelvinator Corp, who provided the drivetrain, and Donald Healey's company, who were responsible for the chassis and body.

                                                   1951 Nash-Healey

     In 1951, following on from his involvement with the Nash-Healey, Donald Healey realised there was a market opportunity for a fast, versatile, and cheap sports car that was more up market than the prevailing MG's, but less expensive than a Jaguar.

     He received agreement from the Austin Motor Corporation to use the engine, transmission, suspension and drivetrain from their Austin A90 Atlantic saloon car, which was being produced at that time.

     He then approached Gerry Coker, who designed the body for the Nash-Healey, to design a sports car that would be a big seller in America.

     He named his new car "The Healey 100" since he was confident it would exceed the magic 100 mph.

     The car made its first appearance at the Earl's Court Motor Show in 1952, and was an immediate success.

     Prior to the show, the head of the Austin Motor Company was so impressed with the car that he offered to mass produce it under the brand name of "Austin-Healey".

     Originally, the cars were built at his Warwick factory, and used one basic design for the chassis.

     Following the agreement with Austin, he would be responsible for the design of the cars, whilst Austin's Longbridge factory would build and market them as Austin-Healeys.

     Both the body and chassis were built by Thompsons of Wolverhampton on a production line at Jensen Motors of West Bromwich.

     A total on nineteen pre-production BN1's were built at the Warwick factory, and all were left hand drive models.

     The first of these were destined for motor shows in New York, Los Angeles, and Frankfurt, and a US sales promotion tour.

     Subsequently, a prominent motoring magazine lauded the car as "The best handling car this year".

     Specification included the following:

  • 2660 cc, overhead valve, 4-cylinder, in line engine
  • Compression ratio of only 7.5:1
  • Two SU carburettors
  • Aluminium and steel body over a steel frame
  • Girling eleven inch drum brakes all round
  • Three speed gearbox with overdrive on second and third
  • Independent front suspension using coil springs with a rigid axle and semi elliptic leaf springs at the rear
  • Steering by a cam and lever system

                                   Austin Healey           Triumph                 Jaguar
Technical Data                   BN1                       TR3                     XK120
Production:                   1953-1955            1955-1957           1948-1954
Output:                            10,030                    13,377                 12,078
Engine: cc                          2660                      1991                     3442
Cylinder, bhp                     4, 90                     4, 100                   6, 160
Top Speed mph                   106                        105                       125
0-60 mph, secs                  11.2                       10.8                      10.0           

                                            1955 Austin Healey BN1                                                                     This shows one of the last of the 106 mph/0-60                                                      in 11.2 secs 100/4 BN1's built, and displaying                                                                         its adjustable windscreen

                                           1954 Austin Healey 100/4                                                                     This pic was shot at the Woodcote Trophy Race                                                                          for pre 56 Sportscars

                                                   Austin Healey 100-4

                                            Austin-Healey 100/4 BN1

                                            Austin-Healey 100/4 BN1

                                       1955 Austin Healey 100/4 BN1

                                             1955 Austin Healey 100/4

                                            1954 Austin Healey 100                                                                         On 2013 London to Brighton Classic Car Run  

                                                            Full Screen                                                                                                                          Full Screen

     The first production cars received badges using the name Austin-Healey 100.

     However, this would change, and they would soon be designated the model name "BN1", which was the first of a series of internal company codes:

  • B - denotes an Austin engine between 2-3 litres
  • N - denoted a two seater
  • BY - denotes a four seater
  • BJ - denotes an original convertible top rather than a detachable top
  • 1 to 8 - Each model had a suffix denoting the particular version of the car

     The original engine of the BN1 sports car developed 90 bhp, but Donald Healey modified a version of this engine to produce 130 bhp.

     He designate this car the 100S, where "S" referred to Sebring.

     In fact, an Austin-Healey 100S, driven by Stirling Moss, came in sixth position in the 1955 Sebring twelve hour race, beating a D-Type Jaguar, and two Ferraris and Masseratis.

     The market was so impressed with the performance of the 100S that Austin-Healey introduced the 100M version, where "M" referred to Le Mans.

     This variant was fitted with larger carburettors, higher compression ratio and pistons, and modified camshaft.

     In 1953, a BN1 won the award of International Motor Car Of The Year in New York, and a standard production car averaged 104 mph on the Utah Salt Flats.

     Also that year, Donald Healey reached nearly 193 mph when driving a 224 bhp, supercharged version of an Austin-Healey 100.

     By the time production ended in 1953, 10,030 BN1's were built, of which less than 10% were made with right hand drive.


     A 1953-55 Austin-Healey 100/4 BN1, in very good condition, would fetch around £34,000/$55,000, whilst an excellent example would command in the region of £44,000/$70,000.


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