The Citroen ZX 1.9D, produced between 1991 and 1994, represents a practical and economical variant within the first generation (N2, Phase I) of Citroen’s ZX hatchback. Positioned as an entry-level offering, it catered to buyers prioritizing fuel efficiency and affordability over outright performance. The ZX, launched as a replacement for the aging BX, aimed to offer a more modern and competitive package in the crowded European family car segment. This 1.9D model, with its 71 horsepower diesel engine, was a mainstay of the range, particularly in markets where diesel fuel was favored due to cost and taxation benefits. It played a significant role in establishing the ZX as a viable alternative to rivals like the Ford Escort and Volkswagen Golf.
Technical Specifications
| Brand | Citroen |
| Model | ZX |
| Generation | ZX (N2, Phase I) 5-door |
| Type (Engine) | 1.9 D (71 Hp) |
| Start of production | 1991 |
| End of production | 1994 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Hatchback |
| Seats | 5 |
| Doors | 5 |
| Fuel consumption (urban) | 6.7 l/100 km (35.1 US mpg, 42.2 UK mpg, 14.9 km/l) |
| Fuel consumption (extra urban) | 4.4 l/100 km (53.5 US mpg, 64.2 UK mpg, 22.7 km/l) |
| Fuel consumption (combined) | 5.9 l/100 km (39.9 US mpg, 47.9 UK mpg, 16.9 km/l) |
| Fuel Type | Diesel |
| Acceleration 0 – 100 km/h | 16.1 sec |
| Acceleration 0 – 62 mph | 16.1 sec |
| Acceleration 0 – 60 mph | 15.3 sec |
| Maximum speed | 167 km/h (103.77 mph) |
| Weight-to-power ratio | 13.3 kg/Hp, 75.1 Hp/tonne |
| Weight-to-torque ratio | 7.9 kg/Nm, 127 Nm/tonne |
| Power | 71 Hp @ 4600 rpm |
| Power per litre | 37.3 Hp/l |
| Torque | 120 Nm @ 2000 rpm (88.51 lb.-ft. @ 2000 rpm) |
| Engine layout | Front, Transverse |
| Engine Model/Code | D9B XUD9A |
| Engine displacement | 1905 cm3 (116.25 cu. in.) |
| Number of cylinders | 4 |
| Engine configuration | Inline |
| Cylinder Bore | 83 mm (3.27 in.) |
| Piston Stroke | 88 mm (3.46 in.) |
| Compression ratio | 23:1 |
| Number of valves per cylinder | 2 |
| Fuel injection system | Precombustion chamber injection |
| Engine aspiration | Naturally aspirated engine |
| Valvetrain | OHC |
| Engine oil capacity | 5 l (5.28 US qt | 4.4 UK qt) |
| Coolant | 8.5 l (8.98 US qt | 7.48 UK qt) |
| Kerb Weight | 945 kg (2083.37 lbs.) |
| Max. weight | 1490 kg (3284.89 lbs.) |
| Max load | 545 kg (1201.52 lbs.) |
| Trunk (boot) space – minimum | 324 l (11.44 cu. ft.) |
| Trunk (boot) space – maximum | 926 l (32.7 cu. ft.) |
| Fuel tank capacity | 56 l (14.79 US gal | 12.32 UK gal) |
| Max. roof load | 75 kg (165.35 lbs.) |
| Permitted trailer load with brakes (12%) | 1000 kg (2204.62 lbs.) |
| Permitted trailer load without brakes | 470 kg (1036.17 lbs.) |
| Permitted towbar download | 70 kg (154.32 lbs.) |
| Length | 4071 mm (160.28 in.) |
| Width | 1700 mm (66.93 in.) |
| Height | 1390 mm (54.72 in.) |
| Wheelbase | 2540 mm (100 in.) |
| Front track | 1410 mm (55.51 in.) |
| Rear (Back) track | 1420 mm (55.91 in.) |
| Front overhang | 849 mm (33.43 in.) |
| Rear overhang | 682 mm (26.85 in.) |
| Minimum turning circle | 11.3 m (37.07 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 | 5 gears, manual transmission |
| Front suspension | Independent type McPherson, Wishbone |
| Rear suspension | Hydro-pneumatic element, Trailing arm |
| Front brakes | Disc |
| Rear brakes | Drum |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Hydraulic Steering |
| Tires size | 165/70 R13 |
Powertrain & Engine Architecture
The heart of the ZX 1.9D is the XUD9A engine, a 1.9-liter inline-four diesel. This engine, a product of Peugeot-Citroen’s collaboration, was known for its robustness and fuel efficiency. The D9B engine code signifies a specific iteration of the XUD9A, optimized for emissions and performance within the ZX range. It utilizes precombustion chamber injection, a system common in diesel engines of the era, where fuel is injected into a small chamber within the cylinder head, promoting more complete combustion. The engine features a single overhead camshaft (OHC) operating two valves per cylinder. The five-speed manual transmission, while not particularly sporty, was durable and well-matched to the engine’s torque characteristics. Automatic transmission options were available on other ZX models, but were not offered with the 1.9D engine.
Driving Characteristics
The ZX 1.9D was not designed for speed. With 71 horsepower, acceleration was leisurely, taking over 16 seconds to reach 60 mph. However, the engine’s 120 Nm (88.51 lb-ft) of torque, available from 2000 rpm, provided adequate pulling power for everyday driving and overtaking maneuvers. The gear ratios were optimized for fuel economy, meaning the engine often felt strained at higher speeds. Compared to the more powerful 1.9 petrol or V6 variants, the 1.9D offered a significantly different driving experience, prioritizing economy and practicality over performance. The handling was typical of front-wheel-drive hatchbacks of the period – safe and predictable, but not particularly engaging.
Equipment & Trim Levels
The 1.9D ZX typically came with a basic level of equipment. Standard features included power steering, central locking, and a basic stereo. Interior upholstery was typically cloth, and the dashboard featured a functional, if somewhat utilitarian, design. Optional extras included electric windows, a sunroof, and upgraded audio systems. The trim level was generally considered entry-level, focusing on providing essential features at an affordable price point. Higher trim levels, available on petrol-powered ZX models, offered more luxurious appointments like leather seats and alloy wheels.
Chassis & Braking
The ZX featured an independent McPherson strut front suspension and a hydro-pneumatic trailing arm rear suspension – a Citroen hallmark. This suspension setup provided a comfortable ride, absorbing bumps and imperfections in the road effectively. However, the 1.9D models often had a simpler rear suspension setup compared to higher-spec variants. Braking was handled by disc brakes at the front and drum brakes at the rear. Anti-lock braking system (ABS) was available, but not standard on all models. The chassis was designed to balance comfort and handling, offering a stable and predictable driving experience.
Market Reception & Comparison
The ZX 1.9D was well-received in markets where diesel cars were popular, such as France, Spain, and Italy. Critics praised its fuel economy and reliability, but noted its lack of performance. Compared to the petrol-powered ZX models, the 1.9D offered significantly better fuel economy, making it an attractive option for high-mileage drivers. However, the petrol engines provided a more refined and engaging driving experience. The 1.9D also compared favorably to rivals like the Ford Escort Diesel and Volkswagen Golf Diesel in terms of fuel efficiency and practicality.
Legacy
The XUD9A engine, found in the ZX 1.9D, is renowned for its durability. Many examples have exceeded 200,000 miles with proper maintenance. Today, the ZX 1.9D is a relatively rare sight on the roads, but it has gained a following among enthusiasts who appreciate its simplicity and reliability. Parts availability can be a challenge, but the engine’s robust construction means that it can withstand considerable wear and tear. The ZX 1.9D represents a practical and economical choice from a bygone era of automotive engineering, offering a glimpse into a time when fuel efficiency and durability were prioritized over outright performance.
