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BMW 3 Series (Article)

Last post 02-29-2008 6:02 PM by automech. 0 replies.
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  • 02-29-2008 6:02 PM

    • automech
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    BMW 3 Series (Article)

    BMW 328


    By Pieter Van Dien


    Most would agree BMW has been successful in
    establishing a brand image for producing
    performance automobiles. Currently, BMW’s
    model lineup provides a performance alternative
    for almost every type of automobile possible, from
    two seat roadsters, to stretch sedans to small
    SUVs. How did BMW successfully build its
    performance reputation? Many would point to the
    iconic 2002, the two door coupe of the early
    seventies that could out drive most sports cars of
    the day. Yet, the true beginnings lie further back
    in the company’s history. While never a big seller
    like the 2002, the BMW 328 built between 1936
    and 1940 was BMW’s first true sporting
    automobile and it led the company to become
    what it is today.
    The BMW 328 began production in 1936, evolving
    from the company’s sedans of the early 1930s.
    While long a producer of well-regarded airplane
    engines and motorcycles, BMW’s first forays into
    manufacturing automobiles began in 1929. One of
    its early cars was the 303 sedan, the first BMW to
    utilize an inline six-cylinder engine and the now
    trademark twin-kidney front grill. With a small but
    smooth 1.2 liter engine, the 303 sold well to
    Germany’s middle class. The success of the 303
    led to the development of larger and more
    powerful engines in the 309, 315 and later 319
    which featured greater speed and performance.
    Profits from this early line of cars allowed for the
    development of a new sports roadster, the 315/1,
    which debuted in 1934 and would become the
    foundation for the 328.
    In creating the 328, BMW sought to combine a
    light and stiff chassis with a more powerful
    engine. The weight and stiffness were addressed
    by a tubular steel chassis adopted from the 319.
    The chassis utilized light gauge tubing but still
    provided high resistance to torsional twisting. A
    relatively supple suspension was employed using
    a controversial (for the time) independent front
    suspension under the belief that a softer setup
    would allow the tires to remain in contact with the
    road, a mantra still touted by BMW today.
    Aerodynamics were also addressed with
    integrated head lamps, attractive fenders and a
    fold-down windscreen resulting in a coefficient of
    drag of .54 for the street roadster (eventually
    lowered to .25Cd for the most highly evolved
    racing coupes). Further completing the sporting
    package were knock-off hubs for quick tire
    changes. The twin-kidney grill and blue and white
    roundel carried on from the 303 as they still do
    today.
    To power the 328, BMW continued the
    development of their straight six engine. While
    budget constraints prevented creating a new twincam
    motor, BMW designers invented a unique
    solution to allow for the preferred two-valves per
    cylinder design. A single camshaft was employed
    to operate the intake valves with the addition of
    transverse pushrods and rockers to operate the
    exhaust valves. This gave the benefits of twovalve
    hemispherical combustion chambers but
    saved the expense and extra weight of a second
    camshaft. Engine capacity was 1.9 liters with a
    compression ratio of 7.5:1. Three downdraft Solex
    carburetors on top provided the air and fuel.
    Turning to 4,500 rpm (6,000 rpm in final racing
    trim), the engine produced 80 horsepower. With a
    weight of just under 1800 pounds, the road car
    was capable of almost 100 mph in street trim
    through a four speed transmission.
    The 328 debuted in June of 1936 at the Eifel
    Races of the Nurburgring. BMW’s efforts in
    developing the new car paid off - it won the race.
    It was a stunning victory for a company that had
    been building cars for less than ten years.
    Subsequent victories were forthcoming by BMW
    supported teams as well as privateers. Of note, in
    1937 a 328 was taken to Brooklands and ran over
    100 miles in one hour. The following year brought
    one-two-three finishes in class at the Mille Miglia
    as well as wins at LeMans and the Spa 24 Hours.
    More specialized racing versions of the original
    car followed, including more highly developed and
    streamlined coupes, one of which won LeMans in
    1939, followed by two 328 roadsters placing
    second and third in class. At the end of
    production, a 135 hp 328 coupe won the
    shortened 1940 Mille Miglia with over a fifteen
    minute lead, followed by three 328 roadsters
    finishing in third, fourth and fifth places.
    Jeremy Walton in Unbeatable BMW lists a total of
    131 victories and 45 gold medals for the 328
    between 1936 and 1940 and stated, “to put it
    bluntly, if you didn’t have a BMW [328] in the late
    1930s and you wanted 2-liter competition
    success, you were wasting your time”.1 Pressed
    into war service for the German government,
    BMW ceased its racing activities in 1940, officially
    disbanding its racing department in 1941. BMW
    returned to the racing scene after the war with its
    328 coupe taking the win at the first post-war race
    in Germany, the Ruhestein Hillclimb in 1946. Six
    years later, a 328 won the 1952 Alpine Rally, a
    two thousand mile event. Even after that, the 328
    continued to be competitive in club and regional
    racing for some years.
    Over its entire production run from 1936 to 1940,
    four hundred and sixty four (464) 328s were
    constructed according to BMW. Of these, a fair
    number were imported to Britain and sold by H.J.
    Addington as Frazer Nash-BMWs. Mr. Addington,
    a competitive racer himself, was responsible for
    some early race victories by 328s in England,
    boosting the car’s image. Frazer Nash imported
    mostly complete cars but also received bare
    chassis for their own unique body work. After
    the war, a form of the 328 engine saw duty in
    the AC Ace, the forerunner to the AC Cobra.
    The 328 in the Collier Auto Museum bears serial
    number 85246, indicating it is the 246th car built
    out of the total run of 464. Looking at the car you
    are immediately taken by the aerodynamic
    efficiency of the vehicle and its graceful lines.
    Compared to its contemporaries, the 328 was
    certainly at the forefront of functional design.
    Rightly or wrongly, many credit the 328 as being
    the inspiration for the later Jaguar XK120 and the
    long line of curvaceous sports cars that followed.
    The cockpit is notably tight, sporting two
    independent seats, a large wheel and minimal
    foot well space. The spare wheel sits in a recess
    1 Jeremy Walton, Unbeatable BMW (Cambridge, MA:
    Robert Bentley, 1998), 37.
    on the outside of the trunk lid, although this was
    not universal across the model line. In all, the 328
    looks like it was made to be driven at high speed.
    Although I have never piloted a 328, I would
    expect it to have a bouncy, raucous ride, even if
    refined and “supple” for its day. That is apparently
    not the case. As observed by Klaus Schnitzer in a
    1999 piece for Roundel Magazine, the monthly
    magazine of the BMW Car Club of America, “my
    expectations were not very high, but it [the 328]
    turned out to be an incredible ride: quick,
    sprightly, and feisty – the ultimate incarnation of
    motoring”.2 Jeremy Walton found the 328 to have
    well matched steering and brakes providing for
    easily controllable drifts such that “you think you
    are the finest driver on earth”.3 The sentiments
    are perhaps best summed up by Mick Walsh of
    Classic & Sportscar who in 1994 wrote “rarely
    have I experienced such a sweet, willing and easy
    car to drive”.4 Those impressions are consistent
    with the automotive press’s comments of the late
    1930s, which found the 328 to deliver a smooth
    ride along with excellent grip, two traits that are
    often at odds with each other.
    Whether BMW would have gone on to become
    the company it is today without the 328 is
    impossible to say. Certainly the 328 launched
    BMW into sporting automobiles and provided an
    early and important taste for auto racing victory.
    The early domination of the 328 allowed the car to
    continue to be competitive even in the post-war
    years, giving BMW credibility in its most perilous
    times. In 1994 (1996 for the US), the 328 badge
    returned to BMW’s lineup, this time as part of a
    full range of 3-series cars offered in coupe, sedan,
    wagon and convertible forms. The name was not
    an exploitation of nostalgia, but a straightforward
    designation indicating a 3-series car with a 2.8
    liter engine. Like its ancestor, the new 328
    sported twin-kidney grills and a straight-six
    engine. It was also a darling of the automotive
    press which delighted in the car’s communicative
    steering, supple handling and power. Perhaps,
    then, despite all of the changes over the years,
    both the new and old 328 are not so different,
    which serves as great testament to BMW’s
    continued and consistent development of
    performance automobiles from the beginning to
    today.


    2 David Haughter, “Living Legend”, Roundel Magazine,
    August, 1999: 35. Klaus Schnitzer contributing.
    3 Walton, Unbeatable BMW, 28.
    4 Walton, Unbeatable BMW, 28, quoting Mick Walsh,
    Classic & Sportscar, October, 1994.

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