The Opel Kadett E 1.8i, produced between 1985 and 1986, represented a significant step up in the Kadett range, offering a blend of practicality, affordability, and respectable performance for the era. Positioned as a mid-range offering within the Kadett E lineup – which spanned from the base 1.0L models to the more potent 1.6S – the 1.8i aimed to provide a comfortable and capable family saloon. It was a key model in Opel’s strategy to compete in the highly contested European compact car segment, and served as a bridge between the more economical versions and the sportier trims. The Kadett E itself was built upon the GM T-platform, shared with other vehicles like the Vauxhall Astra, Isuzu Gemini, and Holden Nova.
Technical Specifications
| Brand | Opel |
| Model | Kadett |
| Generation | Kadett E |
| Type (Engine) | 1.8i (100 Hp) |
| Start of production | 1985 |
| End of production | 1986 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 10.5 sec |
| Acceleration 0 – 62 mph | 10.5 sec |
| Acceleration 0 – 60 mph | 10 sec |
| Maximum speed | 188 km/h (116.82 mph) |
| Weight-to-power ratio | 9.6 kg/Hp, 104.2 Hp/tonne |
| Weight-to-torque ratio | 6.9 kg/Nm, 145.8 Nm/tonne |
| Power | 100 Hp @ 5800 rpm |
| Power per litre | 55.7 Hp/l |
| Torque | 140 Nm @ 3000 rpm (103.26 lb.-ft. @ 3000 rpm) |
| Engine layout | Front, Transverse |
| Engine Model/Code | C18NE |
| Engine displacement | 1796 cm3 (109.6 cu. in.) |
| Number of cylinders | 4 |
| Engine configuration | Inline |
| Cylinder Bore | 84.8 mm (3.34 in.) |
| Piston Stroke | 79.5 mm (3.13 in.) |
| Compression ratio | 8.9:1 |
| Number of valves per cylinder | 2 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | Naturally aspirated engine |
| Engine oil capacity | 4 l (4.23 US qt | 3.52 UK qt) |
| Coolant | 6.5 l (6.87 US qt | 5.72 UK qt) |
| Kerb Weight | 960 kg (2116.44 lbs.) |
| Max. weight | 1445 kg (3185.68 lbs.) |
| Max load | 485 kg (1069.24 lbs.) |
| Trunk (boot) space – minimum | 550 l (19.42 cu. ft.) |
| Trunk (boot) space – maximum | 890 l (31.43 cu. ft.) |
| Fuel tank capacity | 52 l (13.74 US gal | 11.44 UK gal) |
| Length | 4218 mm (166.06 in.) |
| Width | 1658 mm (65.28 in.) |
| Height | 1400 mm (55.12 in.) |
| Wheelbase | 2520 mm (99.21 in.) |
| Front track | 1406 mm (55.35 in.) |
| Rear (Back) track | 1406 mm (55.35 in.) |
| Minimum turning circle | 10.5 m (34.45 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 brakes | Disc |
| Rear brakes | Drum |
Powertrain & Engine Architecture
The heart of the Kadett E 1.8i was the C18NE engine, an 1796cc inline-four cylinder unit. This engine was a naturally aspirated design, featuring a cast iron block and an aluminum cylinder head. It utilized a Bosch Mono-Jetronic fuel injection system, a relatively simple but effective system for its time, delivering fuel through a single central injector. The engine employed a two-valve per cylinder configuration, operated by a single overhead camshaft. The C18NE was known for its durability and relative simplicity, making it easier to maintain compared to more complex contemporary engines. The four-speed manual transmission was the standard offering, providing a direct and engaging driving experience. While an automatic transmission was available, it was less common and often considered to detract from the engine’s performance.
Driving Characteristics
The 1.8i Kadett E offered a noticeable improvement in performance over the smaller-engined variants. With 100 horsepower, it could achieve 0-60 mph in around 10 seconds and reach a top speed of 116.82 mph. The engine delivered a reasonably broad torque curve, making it tractable in everyday driving situations. However, it wasn’t a particularly rev-happy engine, and its power began to taper off noticeably above 5000 rpm. The four-speed manual gearbox was well-matched to the engine’s characteristics, providing adequate spacing between gears. Compared to the 1.6S, the 1.8i offered a more relaxed driving experience, prioritizing usability over outright sportiness. The automatic transmission, when equipped, further softened the driving experience, but at the cost of acceleration and fuel economy.
Equipment & Trim Levels
The Kadett E 1.8i typically came equipped with features considered standard for a mid-range family saloon in the mid-1980s. This included cloth upholstery, a basic stereo system, and manual windows and door locks. Power steering was often an optional extra, as was air conditioning. Higher trim levels, such as the ‘Formel’ or ‘City’ packages, added features like upgraded interior trim, alloy wheels, and a sunroof. The dashboard layout was functional and straightforward, with clearly marked gauges and easy-to-use controls. The interior space was adequate for a car of its size, offering comfortable seating for five adults.
Chassis & Braking
The Kadett E utilized a MacPherson strut front suspension and a torsion beam rear suspension. This setup provided a good balance between ride comfort and handling. The front brakes were disc brakes, offering good stopping power, while the rear brakes were drum brakes, which were typical for this class of vehicle at the time. Stabilizer bars were fitted to both the front and rear axles, helping to reduce body roll during cornering. The steering was rack and pinion, providing precise and responsive handling. The relatively lightweight construction of the Kadett E contributed to its nimble handling characteristics.
Market Reception & Comparison
The Kadett E 1.8i was generally well-received by automotive critics. It was praised for its practicality, affordability, and respectable performance. However, some critics noted that the engine lacked refinement compared to some of its rivals. Compared to the 1.6S, the 1.8i offered a more relaxed driving experience and slightly better fuel economy. The 1.8i also proved to be more reliable than some of the more complex engine options in the Kadett E range. Fuel economy was respectable for the time, averaging around 30-35 mpg in mixed driving conditions.
Legacy
The Opel Kadett E 1.8i, while not a particularly rare or collectible model today, remains a popular choice among classic car enthusiasts. The C18NE engine is known for its durability and relative simplicity, making it a relatively easy engine to maintain and repair. Parts availability is generally good, and the Kadett E 1.8i can be found in reasonable condition on the used car market. It represents a significant piece of automotive history, embodying the spirit of affordable and reliable family motoring in the 1980s. Its robust construction and straightforward design have ensured that many examples are still on the road today, a testament to its enduring quality.
