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1931 Bugatti Type 37A Hanni Roadster

Bugatti Type 37A Hanni Roadster

1931 Bugatti Type 37A Hanni Roadster

The 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.


See full 1931 Bugatti Type 37A Hanni Roadster Gallery here


Specs & Performance

engine Inline-4 w/Roots Supercharger
position Front Longitudinal
aspiration Roots Supercharger
valvetrain SOHC, 3 Valves per Cyl
displacement 1496 cc / 91.3 in³
bore 69 mm / 2.72 in
stroke 100 mm / 3.94 in
power 67.1 kw / 90 bhp
specific output 60.16 bhp per litre
bhp/weight 125.0 bhp per tonne
redline 5000
driven wheels RWD
front tires 27 x 4.40
rear tires 27 x 4.40
front brakes Drums
f brake size mm / in
rear brakes Drums
r brake size mm / in
curb weight 720 kg / 1587 lbs
wheelbase 2400 mm / 94.5 in
front track 1200 mm / 47.25 in
rear track 1200 mm / 47.25 in
transmission 4-Speed Manual
gear ratios :1
final drive 3.86:1