The Isuzu Impulse Coupe 1.6 i 12V (95 hp) represents an entry-level offering within the second-generation Impulse range, produced between 1990 and 1995. Positioned as a more affordable and fuel-efficient alternative to the turbocharged and higher-displacement models, this variant aimed to broaden the Impulse’s appeal in markets where sporty coupes needed to balance performance with practicality. The Impulse, known as the Piazza in Japan, was Isuzu’s attempt to capture a share of the increasingly popular compact coupe segment, competing with vehicles like the Toyota Celica and Honda Prelude. This particular 1.6-liter version was primarily targeted at buyers seeking stylish transportation with reasonable running costs.
Technical Specifications
| Brand | Isuzu |
| Model | Impulse |
| Generation | Impulse Coupe |
| Type (Engine) | 1.6 i 12V (95 Hp) |
| Start of production | 1990 |
| End of production | 1995 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Coupe |
| Seats | 4 |
| Doors | 2 |
| Fuel consumption (urban) | 11 l/100 km (21.4 US mpg) |
| Fuel consumption (extra urban) | 7 l/100 km (33.6 US mpg) |
| Fuel Type | Petrol (Gasoline) |
| Maximum speed | 170 km/h (105.63 mph) |
| Weight-to-power ratio | 10.9 kg/Hp |
| Weight-to-torque ratio | 7.9 kg/Nm |
| Power | 95 Hp @ 5800 rpm |
| Power per litre | 59.8 Hp/l |
| Torque | 131 Nm @ 4800 rpm (96.62 lb.-ft. @ 4800 rpm) |
| Engine layout | Front, Transverse |
| Engine displacement | 1588 cm3 (96.91 cu. in.) |
| Number of cylinders | 4 |
| Engine configuration | Inline |
| Cylinder Bore | 80 mm (3.15 in.) |
| Piston Stroke | 79 mm (3.11 in.) |
| Compression ratio | 9.1:1 |
| Number of valves per cylinder | 3 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | Naturally aspirated |
| Kerb Weight | 1035 kg (2281.78 lbs.) |
| Trunk (boot) space – minimum | 310 l (10.95 cu. ft.) |
| Trunk (boot) space – maximum | 620 l (21.9 cu. ft.) |
| Fuel tank capacity | 47 l (12.42 US gal) |
| Length | 4150 mm (163.39 in.) |
| Width | 1695 mm (66.73 in.) |
| Height | 1300 mm (51.18 in.) |
| Wheelbase | 2450 mm (96.46 in.) |
| Front track | 1430 mm (56.3 in.) |
| Rear track | 1400 mm (55.12 in.) |
| Drivetrain Architecture | Front wheel drive |
| Number of gears and type of gearbox | 5 gears, manual transmission |
| Front suspension | Coil spring |
| Rear suspension | Coil spring |
| Front brakes | Ventilated discs |
| Rear brakes | Drum |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Hydraulic |
| Tires size | 185/60 HR14 |
Powertrain & Engine Architecture
The heart of the Impulse Coupe 1.6 i 12V is the 4ZE1 engine, a 1.6-liter inline-four cylinder powerplant. This engine utilizes a single overhead camshaft (SOHC) design with three valves per cylinder (two intake, one exhaust). The 4ZE1 employed multi-port fuel injection, a relatively modern feature for its time, contributing to improved fuel efficiency and smoother operation compared to carbureted engines. The engine’s 95 horsepower output at 5800 rpm and 131 Nm (96.62 lb-ft) of torque at 4800 rpm were respectable for its displacement, but positioned it as the entry point to the Impulse lineup. The engine was paired with a five-speed manual transmission, which was the standard offering. The transmission was chosen for its durability and relatively simple design, contributing to lower maintenance costs.
Driving Characteristics
The 1.6-liter Impulse Coupe offered a comfortable, if not particularly exhilarating, driving experience. Acceleration was adequate for everyday driving, but noticeably slower than the turbocharged or V6-powered versions. The five-speed manual transmission provided reasonable control, but the engine lacked the low-end torque to make spirited driving effortless. Gear ratios were tuned for fuel economy, meaning frequent downshifts were necessary when tackling hills or overtaking. The front-wheel-drive configuration provided predictable handling, but could exhibit some understeer when pushed hard. Compared to the more powerful Impulse variants, the 1.6L felt less responsive and required more driver input to maintain momentum.
Equipment & Trim Levels
The 1.6 i 12V Impulse Coupe typically came with a fairly basic level of equipment. Standard features generally included power steering, a basic audio system, cloth upholstery, and manual windows and locks. Air conditioning was often an optional extra. Interior trim was functional and straightforward, prioritizing durability over luxury. The dashboard layout was clean and easy to use, with clearly marked gauges. Optional extras could include alloy wheels, upgraded audio systems, and a sunroof. The trim level was generally considered the base model, appealing to buyers prioritizing affordability and fuel efficiency.
Chassis & Braking
The Impulse Coupe utilized a relatively simple chassis design, featuring coil springs and a stabilizer bar at both the front and rear. The front suspension employed MacPherson struts, while the rear utilized a twist-beam setup. Braking duties were handled by ventilated discs at the front and drum brakes at the rear. ABS (Anti-lock Braking System) was often included as standard equipment, enhancing safety. The suspension tuning prioritized ride comfort over sporty handling, resulting in a compliant ride quality. The use of drum brakes on the rear was a cost-saving measure, and contributed to a slightly longer stopping distance compared to models equipped with rear discs.
Market Reception & Comparison
The Isuzu Impulse Coupe 1.6 i 12V was generally well-received as an affordable and stylish coupe. Critics praised its fuel efficiency and comfortable ride, but noted its lack of outright performance. Compared to the turbocharged and V6-powered Impulse models, the 1.6L offered significantly lower running costs, but at the expense of driving excitement. It competed directly with other entry-level coupes like the Toyota Celica and Honda Prelude, offering a slightly different styling and a more affordable price point. Reliability was generally good, although the engine’s timing belt required periodic replacement to prevent catastrophic failure.
Legacy
The Isuzu Impulse Coupe 1.6 i 12V, while not the most powerful or sought-after version of the Impulse, remains a relatively affordable and accessible classic coupe. The 4ZE1 engine is known for its durability, provided it receives regular maintenance, particularly timing belt replacements. In the used car market, these models are often found in reasonable condition, making them attractive to enthusiasts seeking a retro-styled coupe without breaking the bank. Parts availability can be a challenge, as Isuzu no longer manufactures parts for this vehicle, but many components are interchangeable with other Isuzu and GM models. The 1.6L Impulse Coupe represents a unique blend of Japanese engineering and American styling, offering a distinctive alternative to more common coupes of the era.
