Become a Member: Get Ad-Free Access to All Our Content

Bugatti Type 39 Grand Prix

1925 Bugatti Type 39 Grand Prix

To comply with the 1.5 litre Grand Prix regulations, Bugatti built the Type 39 which was similar in specification to the larger Type 35C. Only the engine was modified to have a shorter stroke that was reduced by 22mm.

The Type 39 was also available with a supercharger and known as the Type 39A. Some engines were produced with an smaller bore to produce 1092cc.

Our feature car is chassis 4607 that was driven by Meo Costantini to 7th overall and first in class at the Grand Prix de l’ACF Tourisme at Montlhéry on July 19, 1925. The formula at Montlhéry was similar to the ACF’s 24 Hours of Le Mans which required fenders, lights, ballast and starters and similar road equipment.

Among the five factory entrants by Bugatti, Costantini managed to beat the Darracqs and his teammates to score a Bugatti 1-2-3-4.

Pictures & Gallery

See full 1925 Bugatti Type 39 Grand Prix Gallery here

Specs & Performance

type Racing Car
built at France
production 10
engine Inline-8
position Front, Longitudinal
aspiration Natural
ignition Magneto
block material Cast Iron
valvetrain SOHC, 3 Valves per Cyl
fuel feed Zenith Carburettor
displacement 1496 cc / 91.29 in³
bore 52 mm / 2.0 in
stroke 88 mm / 3.5 in
power 67.1 kw / 90 bhp @ 5500 rpm
specific output 60.16 bhp per litre
bhp/weight 120.0 bhp per tonne
torque 81.3 nm / 60 ft lbs @ 2000 rpm
body / frame Aluminum Body over Steel Frame
driven wheels RWD
wheel type Cast Aluminum w/Integral Brake Drum
front tires 28 x 4.95
rear tires 28 x 4.95
front brakes Drums
rear brakes Drums
front wheels F 48.3 x 12.7 cm / 19 x 5 in
rear wheels R 48.3 x 12.7 cm / 19 x 5 in
steering Worm & Wheel
f suspension Solid Axle w/Semi-Elliptic Leaf Springs, Friction Dampers
r suspension Live Axle w/Reverse Quater-Elliptic Leaf Springs, Friction Dampers
curb weight 750 kg / 1654 lbs
wheelbase 2400 mm / 94.5 in
front track 1200 mm / 47.2 in
rear track 1200 mm / 47.2 in
transmission 4-Speed Manual
final drive 4.15:1
top speed ~185.03 kph / 115 mph
0 – 100 mph ~9.0 seconds