1931 Bugatti Type 37A Hanni Roadster


1931 Bugatti Type 37A Hanni Roadster

1931 Bugatti Type 37A Hanni Roadster

TThe Type 37 was established to bring the successful Type 35 chassis to the road. It used an Inline-4 from the Type 40 within the Type 35 chassis. Some cars had a Roots-type supercharger and received the designation 37A. It became a favorable car among amateur drivers, who especially appreciated the car in voiturette racing.

The car featured above started life with a cigar-like Grand Prix body. In 1937 the owner commissioned Hanni, a Swiss coachbuilder based in Zurich, to a rebody it with a roadster design. To fit the theme set out, the gearshift and handbrake, which are normally mounted outside the car, were relocated to fit within the interior. Highlights of Hanni’s design included a smaller, redesigned radiator and an ostrich skin upholstery .

In 1996, the car sold at a Christies’ auction for $220 000 USD. At the time of sale the car was reported as original.

If anyone has any more information on this car, we will post what is sent. Thanks.

Story by Richard Owen for Supercars.net

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In Detail

engineInline-4 w/Roots Supercharger
positionFront Longitudinal
aspirationRoots Supercharger
valvetrainSOHC, 3 Valves per Cyl
displacement1496 cc / 91.3 in³
bore69 mm / 2.72 in
stroke100 mm / 3.94 in
power67.1 kw / 90 bhp
specific output60.16 bhp per litre
bhp/weight125.0 bhp per tonne
redline5000
driven wheelsRWD
front tires27 x 4.40
rear tires27 x 4.40
front brakesDrums
f brake sizemm / in
rear brakesDrums
r brake sizemm / in
curb weight720 kg / 1587 lbs
wheelbase2400 mm / 94.5 in
front track1200 mm / 47.25 in
rear track1200 mm / 47.25 in
transmission4-Speed Manual
gear ratios:1
final drive3.86:1