The Chevrolet Malibu IV Sport Coupe, produced for the 1979 and 1980 model years, represented a downsized iteration of Chevrolet’s popular mid-size offering. Positioned as a sporty variant within the fourth generation Malibu lineup (1978-1983), the 5.0 V8 with a three-speed automatic transmission offered a blend of performance and relative affordability. This particular configuration aimed to appeal to buyers seeking a more engaging driving experience than the base models, while still providing the comfort and convenience of an automatic transmission. It occupied a middle ground in the Malibu range, sitting below the more powerful, but less common, higher-output V8 options.
Technical Specifications
| Brand | Chevrolet |
| Model | Malibu |
| Generation | Malibu IV Sport Coupe |
| Type (Engine) | 5.0 V8 (155 Hp) CAT Automatic |
| Start of production | 1979 |
| End of production | 1980 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Coupe |
| Seats | 6 |
| Doors | 2 |
| Fuel Type | Petrol (Gasoline) |
| Weight-to-power ratio | 9.5 kg/Hp, 104.8 Hp/tonne |
| Weight-to-torque ratio | 4.6 kg/Nm, 219.7 Nm/tonne |
| Power | 155 Hp @ 4000 rpm |
| Power per litre | 31 Hp/l |
| Torque | 325 Nm @ 1600 rpm, 239.71 lb.-ft. @ 1600 rpm |
| Engine layout | Front, Longitudinal |
| Engine displacement | 5001 cm3, 305.18 cu. in. |
| Number of cylinders | 8 |
| Engine configuration | V-engine |
| Cylinder Bore | 95 mm, 3.74 in. |
| Piston Stroke | 88.4 mm, 3.48 in. |
| Compression ratio | 8.6:1 |
| Number of valves per cylinder | 2 |
| Fuel injection system | Carburettor |
| Engine aspiration | Naturally aspirated engine |
| Valvetrain | OHV |
| Kerb Weight | 1479 kg, 3260.64 lbs |
| Trunk (boot) space – maximum | 470 l, 16.6 cu. ft. |
| Fuel tank capacity | 68 l, 17.96 US gal | 14.96 UK gal |
| Length | 4895 mm, 192.72 in. |
| Width | 1816 mm, 71.5 in. |
| Height | 1354 mm, 53.31 in. |
| Wheelbase | 2745 mm, 108.07 in. |
| Front track | 1486 mm, 58.5 in. |
| Rear (Back) track | 1467 mm, 57.76 in. |
| Front overhang | 915 mm, 36.02 in. |
| Rear overhang | 1235 mm, 48.62 in. |
| Ride height (ground clearance) | 137 mm, 5.39 in. |
| Minimum turning circle (turning diameter) | 12.2 m, 40.03 ft. |
| Approach angle | 23° |
| Departure angle | 16° |
| Ramp-over (brakeover) angle | 14° |
| Drivetrain Architecture | The Internal combustion engine (ICE) drives the rear wheels of the vehicle. |
| Drive wheel | Rear wheel drive |
| Number of gears and type of gearbox | 3 gears, automatic transmission |
| Front suspension | Independent, type McPherson with coil spring and anti-roll bar |
| Rear suspension | dependent spring suspension, Transverse stabilizer, Trailing arm |
| Front brakes | Ventilated discs |
| Rear brakes | Drum |
| Steering type | Steering rack and pinion |
| Tires size | 185/75 R14 |
| Wheel rims size | 6.0J x 14 |
Powertrain & Engine Architecture
The heart of this Malibu variant was Chevrolet’s 305 cubic inch (5.0 liter) small-block V8 engine. This engine, designated with emissions control systems (CAT), produced 155 horsepower at 4000 rpm and 325 Nm (239.71 lb-ft) of torque at a relatively low 1600 rpm. The engine utilized a two-valve per cylinder OHV (Overhead Valve) configuration and a carburetor for fuel delivery. While not the most technologically advanced fuel system by the late 1970s, the carburetor provided acceptable performance and was relatively simple to maintain. The engine’s longitudinal front-mount layout was typical for rear-wheel-drive American cars of the era. The three-speed automatic transmission, a TH350 variant, was chosen for its smoothness and ease of use, catering to a broader audience than a manual transmission. The transmission’s gear ratios were optimized for both acceleration and highway cruising, though it wasn’t particularly geared for maximizing fuel economy.
Driving Characteristics
The 155 hp V8 and three-speed automatic combination delivered respectable, if not exhilarating, performance. Acceleration from 0 to 60 mph was estimated to be around 9-10 seconds, which was competitive for its time. The relatively high torque output at low rpm made the car feel responsive in everyday driving situations. Compared to the manual transmission versions of the Malibu, the automatic offered smoother shifts but at the expense of some driver engagement and potentially slightly slower acceleration. Compared to higher-output V8 options, this configuration prioritized drivability and fuel efficiency over outright power. The automatic transmission’s shift points were programmed to balance performance and fuel economy, resulting in a comfortable, if not sporty, driving experience.
Equipment & Trim Levels
The Sport Coupe trim generally included features like color-keyed carpeting, a sport steering wheel, and upgraded interior trim compared to the base Malibu models. Standard features typically included a basic AM radio, cloth upholstery, and full wheel covers. Optional extras included air conditioning, power steering, power brakes, a more advanced stereo system, and upgraded interior trim packages. The Sport Coupe designation also often included exterior cosmetic enhancements, such as a rear spoiler and unique striping.
Chassis & Braking
The Malibu IV Sport Coupe utilized a body-on-frame construction, common for American cars of the period. The front suspension was an independent McPherson strut design with coil springs and an anti-roll bar, providing a reasonable level of ride comfort and handling. The rear suspension employed a traditional leaf spring setup with a transverse stabilizer, which was less sophisticated but durable and cost-effective. Braking duties were handled by ventilated discs at the front and drum brakes at the rear. The braking system was adequate for normal driving conditions, but lacked the stopping power of more modern systems. Steering was accomplished via a rack and pinion system, offering reasonably precise control.
Market Reception & Comparison
The 1979-1980 Malibu IV Sport Coupe with the 5.0 V8 and automatic transmission received mixed reviews. Critics generally praised the car’s comfortable ride and spacious interior, but noted that its performance was not particularly exciting. Fuel economy was also a concern, especially given the rising gas prices of the late 1970s. Compared to the six-cylinder Malibu models, the V8 offered significantly more power, but at the cost of reduced fuel efficiency. Compared to other V8-powered coupes of the era, the Malibu offered a good value proposition, providing a blend of performance, comfort, and affordability.
Legacy
The Chevrolet Malibu IV Sport Coupe 5.0 V8 Automatic, while not a particularly rare or collectible car today, represents a significant chapter in Chevrolet’s history. The 305 small-block V8 engine proved to be remarkably durable and reliable, and many examples are still on the road today. The automatic transmission, while not as desirable to enthusiasts as a manual, is also known for its longevity. In the used car market, these Malibus are often sought after by those looking for a classic American coupe that is relatively affordable to maintain and repair. The car’s simple mechanical design and readily available parts make it a popular choice for restoration projects and hot-rodding enthusiasts.
