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De Dion-Bouton 8 HP

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Description

The De Dion-Bouton 8 HP was a well-regarded model introduced in the early 20th century, building on the company’s reputation for producing mechanically reliable and elegantly constructed light cars. At a time when many manufacturers were still experimenting with the fundamentals of automobile engineering, De Dion-Bouton had already established a standard of dependable, small-displacement vehicles that were both accessible and practical for the growing class of private motorists.

The 8 HP model was typically powered by a single-cylinder engine producing eight horsepower, mounted at the rear or mid-rear depending on the variant and body style. This represented an increase in power and displacement over the company’s earlier 6 HP offerings, giving the vehicle improved performance while still maintaining simplicity. The engine was air-cooled or water-cooled depending on the year and featured a magneto ignition system. Valve operation used De Dion-Bouton’s proven configuration of mechanically actuated exhaust and automatic intake valves, resulting in consistent combustion and ease of maintenance.

Power was delivered to the rear wheels through a two- or three-speed gearbox, with chain or shaft drive depending on the configuration. This allowed for better adaptability to gradients and road conditions, which was particularly useful given the rough state of many early 20th-century roads. The car was capable of reaching speeds of approximately 45 to 50 km/h, making it suitable for both urban and rural driving.

The De Dion-Bouton 8 HP was offered with several body styles, including two-seat runabouts, vis-à-vis configurations, and tonneau variants capable of carrying more passengers. The chassis was constructed from steel or tubular frames, with solid axles and leaf-spring suspension providing a basic but effective ride. The steering system, by this time, had largely transitioned to a wheel rather than a tiller, offering more precise control. Braking was managed via a transmission brake, often supplemented by mechanical brakes on the rear wheels.

The 8 HP model appealed to a wide range of buyers looking for a balance of performance, reliability, and elegance. It was priced competitively for its time, and its robust engineering made it a popular export as well, especially to Britain and other parts of continental Europe. The car’s ease of operation and maintenance further enhanced its appeal to early motorists who were still becoming accustomed to this new mode of transport.

Today, the De Dion-Bouton 8 HP is appreciated by collectors for its historical importance and mechanical charm. As part of the lineage that helped define the early automobile, it reflects the transition from experimental motoring to a more mature, widely accessible form of personal transportation. Surviving examples, though rare, provide valuable insight into the engineering priorities and social context of motoring during the Edwardian era.

Additional information

Manufacturer

De Dion-Bouton

Country

France

Production Started

1903

Production Stopped

1903

Vehicle Type

Bodystyle

Roadster

Number of Doors

0

Number of Seats

2

Top Speed

31 mph (50 kph)

0-60 mph (0-100 kph)

Power

6 / 8 / 8 @ 1500 rpm

Torque

Engine Manufacturer

De Dion-Bouton

Engine

Inline 1

Engine Location

Front

Engine Displacement

864 cc (52.5 cu in)

Valvetrain

SV

Valves per Cylinder

2

Bore / Stroke

100 x 110 mm (3.937 x 4.331 in)

Compression Ratio

Cooling System

Water

Charging System

Fuel Type

Petrol

Fuel System

Carburator

Aspiration

Normal

Fuel Capacity

Drive

Rear

Transmission

M2

Steering

Front Brakes

Rear Brakes

Front Suspension

Rear Suspension

Tyre Dimensions

Chassis

Weight

580 kg (1279 lb)

Length

Width

Height

Wheelbase

1820 mm (71.7 in)