The Citroën DS II Cabriolet Chapron 21 (100 Hp) represents a pinnacle of French automotive luxury and engineering from the mid-1960s. Produced between 1965 and 1967, this variant was a limited-production, high-end offering within the broader DS II range, itself an evolution of the groundbreaking Citroën DS. The “Chapron” designation signifies the coachbuilder, Henri Chapron, responsible for the elegant convertible bodywork. This model occupied a unique position, blending Citroën’s innovative technology with Chapron’s bespoke craftsmanship, appealing to a discerning clientele seeking exclusivity and style. It was built on the DS platform (specifically the ID21 chassis) and represented a significant investment compared to the standard DS saloon.
Technical Specifications
| Brand | Citroën |
| Model | DS |
| Generation | DS II Cabriolet Chapron |
| Type (Engine) | 21 (100 Hp) |
| Start of production | 1965 |
| End of production | 1967 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Cabriolet |
| Seats | 2 |
| Doors | 2 |
| Fuel Type | Petrol (Gasoline) |
| Weight-to-power ratio | 13.2 kg/Hp, 76 Hp/tonne |
| Weight-to-torque ratio | 8 kg/Nm, 124.7 Nm/tonne |
| Power | 100 Hp @ 5500 rpm |
| Power per litre | 46 Hp/l |
| Torque | 164 Nm @ 3000 rpm (120.96 lb.-ft. @ 3000 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | B22644 |
| Engine displacement | 2175 cm3 (132.73 cu. in.) |
| Number of cylinders | 4 |
| Engine configuration | Inline |
| Cylinder Bore | 90 mm (3.54 in.) |
| Piston Stroke | 85.5 mm (3.37 in.) |
| Compression ratio | 8.75:1 |
| Number of valves per cylinder | 2 |
| Fuel injection system | Carburettor |
| Engine aspiration | Naturally aspirated engine |
| Engine oil capacity | 4 l (4.23 US qt | 3.52 UK qt) |
| Coolant | 11 l (11.62 US qt | 9.68 UK qt) |
| Kerb Weight | 1315 kg (2899.08 lbs.) |
| Max. weight | 1760 kg (3880.14 lbs.) |
| Max load | 445 kg (981.06 lbs.) |
| Fuel tank capacity | 65 l (17.17 US gal | 14.3 UK gal) |
| Length | 4860 mm (191.34 in.) |
| Width | 1790 mm (70.47 in.) |
| Height | 1420 mm (55.91 in.) |
| Wheelbase | 3125 mm (123.03 in.) |
| Front track | 1500 mm (59.06 in.) |
| Rear (Back) track | 1300 mm (51.18 in.) |
| Minimum turning circle | 11 m (36.09 ft.) |
| Drivetrain Architecture | The Internal combustion engine (ICE) drives the front wheels of the vehicle. |
| Drive wheel | Front wheel drive |
| Number of gears and type of gearbox | 4 gears, manual transmission |
| Front suspension | Hydro-pneumatic element |
| Rear suspension | Hydro-pneumatic element |
| Front brakes | Disc |
| Rear brakes | Drum |
| Steering type | Steering rack and pinion |
| Power steering | Hydraulic Steering |
Powertrain & Engine Architecture
The DS II Cabriolet Chapron 21 was powered by Citroën’s 2.2-liter (2175 cc) inline-four cylinder engine, designated the B22644. This engine, while sharing a basic architecture with other DS engines, was tuned to produce 100 horsepower at 5500 rpm and 164 Nm (120.96 lb-ft) of torque at 3000 rpm. It featured a cast iron block and cylinder head, with a single overhead camshaft operating two valves per cylinder. Fuel delivery was managed by a Solex carburetor, a common setup for the era. The engine’s longitudinal front-engine layout contributed to the car’s balanced handling. The four-speed manual transmission was standard, providing a relatively direct connection between the engine and the front wheels. This engine, while not exceptionally powerful by contemporary standards, was known for its smoothness and refinement, characteristics valued in a luxury vehicle.
Driving Characteristics
The 100 hp engine, coupled with the four-speed manual gearbox, provided adequate, though not exhilarating, performance. Acceleration was respectable for the time, but the DS II Cabriolet Chapron 21 was more about effortless cruising than outright speed. The hydropneumatic suspension, a Citroën hallmark, delivered an exceptionally smooth and comfortable ride, absorbing bumps and imperfections in the road with remarkable ease. The steering, also hydraulically assisted, was light and precise. Compared to the DS 19 (with its lower-output engine) the 21 offered noticeably more power, particularly useful for highway driving and overtaking. However, it lacked the performance of the DS 23, which featured a larger engine. The front-wheel drive configuration provided good traction in most conditions, but could exhibit torque steer under hard acceleration.
Equipment & Trim Levels
As a Chapron-bodied vehicle, the DS II Cabriolet 21 was exceptionally well-equipped. Standard features included luxurious leather upholstery, wood trim on the dashboard and door panels, and power-assisted steering. The convertible top was fully lined and electrically operated. Optional extras included upgraded audio systems, specialized paint colors, and bespoke interior modifications tailored to the customer’s preferences. The interior layout was typical of the DS, with a distinctive dashboard featuring a large speedometer and a series of auxiliary gauges. The overall ambiance was one of understated elegance and sophistication.
Chassis & Braking
The DS II Cabriolet Chapron 21 utilized Citroën’s renowned hydropneumatic suspension system, providing a self-leveling ride and exceptional comfort. The front suspension employed independent hydropneumatic elements, while the rear suspension also featured hydropneumatic spheres. Braking was accomplished via disc brakes at the front and drum brakes at the rear. The hydraulic braking system, also linked to the hydropneumatic suspension, provided effective stopping power. The car’s relatively heavy weight (1315 kg / 2899 lbs) necessitated a robust braking system.
Market Reception & Comparison
The DS II Cabriolet Chapron 21 was critically acclaimed for its elegant styling, luxurious interior, and innovative technology. However, its high price tag limited its appeal to a relatively small segment of the market. Critics praised the car’s ride quality and handling, but some noted that the engine’s performance was adequate rather than outstanding. Compared to other luxury convertibles of the era, such as the Mercedes-Benz SL, the DS II Cabriolet Chapron 21 offered a unique blend of French flair and technological innovation. The DS 19 Cabriolet Chapron, with its smaller engine, was a more affordable option, while the DS 23 offered superior performance but at a higher cost.
Legacy
The Citroën DS II Cabriolet Chapron 21 remains a highly sought-after classic car today. Its rarity, elegant design, and innovative technology have made it a favorite among collectors. The B22644 engine, while not known for being particularly fragile, requires regular maintenance to ensure its continued reliability. Parts availability can be a challenge, but a dedicated network of Citroën enthusiasts and specialists exists to support owners. The hydropneumatic suspension system, while incredibly comfortable, requires periodic servicing and can be expensive to repair. Despite these challenges, the DS II Cabriolet Chapron 21 continues to represent a unique and compelling chapter in automotive history, embodying the spirit of French innovation and luxury.


