The Oldsmobile Alero 2.4 16, producing 152 horsepower, was a front-wheel drive compact sedan manufactured from 1998 to 2001. It represented Oldsmobile’s entry into the increasingly competitive mid-size segment, aiming to offer a blend of style, comfort, and value. Positioned as a mainstream offering within the Alero lineup, the 2.4L engine and four-speed automatic transmission combination was intended to appeal to buyers prioritizing ease of use and affordability over outright performance. It was built on the GM N-body platform, shared with other vehicles like the Pontiac Grand Am and Buick Skylark.
Technical Specifications
| Brand | Oldsmobile |
| Model | Alero |
| Generation | Alero |
| Type (Engine) | 2.4 16 (152 Hp) |
| Start of production | April, 1998 |
| End of production | 2001 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (urban) | 11.2 l/100 km (21 US mpg) |
| Fuel consumption (extra urban) | 7.8 l/100 km (30.2 US mpg) |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 11 sec |
| Acceleration 0 – 62 mph | 11 sec |
| Acceleration 0 – 60 mph | 10.5 sec |
| Maximum speed | 180 km/h (111.85 mph) |
| Weight-to-power ratio | 9 kg/Hp |
| Weight-to-torque ratio | 6.7 kg/Nm |
| Power | 152 Hp @ 5600 rpm |
| Torque | 203 Nm @ 4400 rpm (149.73 lb.-ft. @ 4400 rpm) |
| Engine layout | Front, Transverse |
| Engine Model/Code | LD9 |
| Engine displacement | 2392 cm3 (145.97 cu. in.) |
| Number of cylinders | 4 |
| Engine configuration | Inline |
| Cylinder Bore | 90 mm (3.54 in.) |
| Piston Stroke | 94 mm (3.7 in.) |
| Compression ratio | 9.5:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | Naturally aspirated engine |
| Valvetrain | DOHC |
| Engine oil capacity | 3.8 l (4.02 US qt | 3.34 UK qt) |
| Coolant | 9.5 l (10.04 US qt | 8.36 UK qt) |
| Kerb Weight | 1370 kg (3020.33 lbs.) |
| Trunk (boot) space – minimum | 435 l (15.36 cu. ft.) |
| Fuel tank capacity | 57 l (15.06 US gal | 12.54 UK gal) |
| Length | 4740 mm (186.61 in.) |
| Width | 1780 mm (70.08 in.) |
| Height | 1390 mm (54.72 in.) |
| Wheelbase | 2720 mm (107.09 in.) |
| Front track | 1500 mm (59.06 in.) |
| Rear (Back) track | 1505 mm (59.25 in.) |
| 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, automatic transmission |
| Front suspension | Spring Strut |
| Rear suspension | Double wishbone |
| Front brakes | Ventilated discs |
| Rear brakes | Ventilated discs |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Hydraulic Steering |
| Tires size | 215/60 R15 |
Powertrain & Engine Architecture
The Alero 2.4 16 was powered by the LD9 engine, a 2.4-liter inline-four cylinder powerplant. This engine was a member of GM’s family of four-cylinder engines, known for its relatively simple design and durability. It featured a dual overhead camshaft (DOHC) valvetrain with four valves per cylinder, contributing to improved breathing and power output. Fuel delivery was handled by a multi-port fuel injection system, optimizing fuel atomization and combustion efficiency. The LD9 produced 152 horsepower at 5600 rpm and 203 Nm (149.73 lb-ft) of torque at 4400 rpm. The engine’s 9.5:1 compression ratio was a compromise between performance and the ability to run on regular unleaded gasoline.
Paired with the LD9 engine was a four-speed automatic transmission. This transmission was a conventional hydraulic automatic, offering smooth shifts and ease of operation. While not particularly advanced, it was well-suited to the engine’s power characteristics and the intended market for the Alero. The transmission’s gear ratios were tuned for comfortable cruising and adequate acceleration, prioritizing fuel economy over sporty performance.
Driving Characteristics
The Alero 2.4 with the automatic transmission delivered a comfortable, if not particularly exciting, driving experience. Acceleration from a standstill to 60 mph took around 10.5 seconds, and the car had a top speed of approximately 112 mph. The automatic transmission provided smooth shifts, but could feel somewhat hesitant during quick acceleration or when attempting to pass on the highway. The engine’s torque peak at 4400 rpm meant that most of its usable power was available in the mid-range, making it suitable for everyday driving. Compared to the available manual transmission, the automatic version sacrificed some responsiveness, but offered greater convenience for many drivers. The Alero wasn’t designed to be a performance car, and the 2.4L automatic reflected that.
Equipment & Trim Levels
The Alero 2.4 16 typically came standard with features such as air conditioning, power windows and locks, an AM/FM stereo, and cloth upholstery. Higher trim levels, such as the GL and GX, added features like alloy wheels, a CD player, upgraded interior trim, and optional features like a sunroof and leather upholstery. The base Alero 2.4 offered a relatively spartan interior, focusing on functionality and affordability. The dashboard layout was straightforward and easy to use, with clearly labeled controls. Safety features included dual front airbags and ABS (Anti-lock Braking System).
Chassis & Braking
The Alero utilized a front-wheel drive layout with a MacPherson strut front suspension and a double wishbone rear suspension. This suspension setup provided a comfortable ride, absorbing bumps and irregularities in the road surface effectively. The front suspension featured a stabilizer bar to reduce body roll during cornering. Braking duties were handled by ventilated disc brakes on all four wheels, providing adequate stopping power for the car’s weight and performance. The ABS system helped to prevent wheel lockup during hard braking, improving stability and control.
Market Reception & Comparison
The Oldsmobile Alero 2.4 16 was generally well-received by critics as a competent and affordable mid-size sedan. However, it wasn’t considered a standout in its class, facing stiff competition from rivals like the Honda Accord, Toyota Camry, and Ford Taurus. The 2.4L engine and automatic transmission combination was praised for its fuel efficiency (around 21 mpg city and 30 mpg highway), but criticized for its lack of power and responsiveness. Compared to the more powerful 3.4L V6 Alero, the 2.4L version offered significantly less performance, but at a lower price point. The 2.4L automatic was often seen as a good choice for drivers prioritizing fuel economy and ease of use over sporty driving dynamics.
Legacy
The Oldsmobile Alero, and specifically the 2.4L automatic variant, has become a relatively affordable and readily available used car. The LD9 engine is known for its reliability, and with proper maintenance, can provide many years of service. However, like many vehicles of this era, the Alero is susceptible to age-related issues such as rust, worn suspension components, and failing sensors. The automatic transmission, while generally reliable, may require servicing or rebuilding after high mileage. Today, the Alero 2.4 16 represents a practical and economical transportation option for budget-conscious buyers, offering a comfortable ride and decent fuel economy.
