The Pontiac Grand Am (H) 2.5, powered by a 98 horsepower engine and equipped with an automatic transmission, represented the entry point into the Grand Am lineup during its 1987-1988 production run. This variant was part of the ‘H’ generation, which spanned from 1985 to 1992, and was positioned as an affordable, practical, and comfortable family sedan. It served as a key model for Pontiac during a period of shifting consumer preferences towards more fuel-efficient and accessible vehicles. The Grand Am, in general, aimed to bridge the gap between the more basic Pontiac 6000 and the more upscale Bonneville.
Technical Specifications
| Brand | Pontiac |
| Model | Grand AM |
| Generation | Grand AM (H) |
| Type (Engine) | 2.5 (98 Hp) Automatic |
| Start of production | 1987 |
| End of production | 1988 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Fuel Type | Petrol (Gasoline) |
| Power | 98 Hp @ 4800 rpm |
| Power per litre | 39.7 Hp/l |
| Torque | 183 Nm @ 3200 rpm |
| Torque (lb-ft) | 134.97 lb.-ft. @ 3200 rpm |
| Engine displacement | 2471 cm3 |
| Engine displacement (cu. in.) | 150.79 cu. in. |
| Number of cylinders | 4 |
| Engine configuration | Inline |
| Cylinder Bore | 101.6 mm (4 in.) |
| Piston Stroke | 76.2 mm (3 in.) |
| Compression ratio | 8.3:1 |
| Number of valves per cylinder | 2 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | Naturally aspirated engine |
| Valvetrain | OHC |
| Engine oil capacity | 4.3 l (4.54 US qt | 3.78 UK qt) |
| Coolant | 7.5 l (7.93 US qt | 6.6 UK qt) |
| Length | 4510 mm (177.56 in.) |
| Width | 1690 mm (66.54 in.) |
| Height | 1340 mm (52.76 in.) |
| Wheelbase | 2630 mm (103.54 in.) |
| Drivetrain Architecture | Front wheel drive |
| Number of gears | 3 |
| Type of gearbox | Automatic transmission |
| Front brakes | Disc |
| Rear brakes | Drum |
Powertrain & Engine Architecture
The heart of the Grand Am 2.5 was the 2.5-liter (150.79 cubic inch) inline four-cylinder engine, designated as the Tech IV. This engine, while not known for its blistering performance, was designed for reliability and fuel efficiency. It featured a single overhead camshaft (OHC) valvetrain operating two valves per cylinder. The engine utilized multi-port fuel injection, a relatively modern feature for the time, which improved fuel atomization and overall engine efficiency compared to earlier carbureted designs. The 8.3:1 compression ratio was a compromise between performance and the ability to run on regular unleaded gasoline. The three-speed automatic transmission, a GM-sourced unit, was chosen for its ease of use and appeal to a broader customer base. It was a fairly conventional automatic, lacking the overdrive gear found in some competing models, which impacted highway fuel economy.
Driving Characteristics
The 98 horsepower and 135 lb-ft of torque delivered by the 2.5-liter engine resulted in modest acceleration. The automatic transmission, while smooth, contributed to a somewhat sluggish feel, particularly when attempting to pass or merge onto highways. The three-speed configuration meant wider gear ratios, and the engine often felt strained at higher speeds. Compared to the optional 2.9-liter V6 engine available in other Grand Am trims, the 2.5-liter automatic was noticeably slower. However, the 2.5L offered a more relaxed driving experience, prioritizing comfort over outright performance. The front-wheel-drive layout provided decent handling in most conditions, but the suspension was tuned more for ride comfort than sporty handling.
Equipment & Trim Levels
The Grand Am 2.5 Automatic typically came with a fairly basic level of standard equipment. This included cloth upholstery, a standard AM/FM radio, and manual windows and locks. Air conditioning was often an optional extra, as were power windows and locks. The interior design was functional and straightforward, with a focus on durability rather than luxury. The dashboard featured a simple instrument cluster with a speedometer, fuel gauge, and temperature gauge. The base trim level was designed to be affordable, and many buyers opted for minimal additional options.
Chassis & Braking
The Grand Am (H) utilized a front-wheel-drive platform with an independent front suspension featuring MacPherson struts and a solid rear axle with coil springs. The braking system consisted of front disc brakes and rear drum brakes. The drum brakes on the rear were a cost-saving measure, and while adequate for normal driving, they lacked the stopping power of disc brakes. The suspension was tuned for a comfortable ride, prioritizing absorbing bumps and providing a smooth driving experience. Stabilizer bars were typically included to reduce body roll during cornering, but the overall handling was not particularly sporty.
Market Reception & Comparison
The Grand Am 2.5 Automatic was generally well-received as an affordable and practical family sedan. Critics noted its comfortable ride and spacious interior, but also pointed out its lack of performance. Compared to other models in the same class, such as the Ford Tempo and Chevrolet Cavalier, the Grand Am offered a slightly more refined interior and a more distinctive exterior styling. However, its fuel economy was not class-leading, and the three-speed automatic transmission was considered outdated by some. The 2.9L V6 Grand Am was the preferred choice for buyers seeking more power, while the 2.5L appealed to those prioritizing affordability and fuel efficiency.
Legacy
The 2.5-liter Tech IV engine and the associated three-speed automatic transmission proved to be relatively reliable powertrains. While not known for exceptional longevity, they were generally capable of reaching high mileage with proper maintenance. Today, the Grand Am 2.5 Automatic is a relatively common sight in the used car market, often found at very affordable prices. Parts availability is generally good, and the simple mechanical design makes it relatively easy to repair. However, due to its age, many examples will require some degree of restoration or maintenance. The Grand Am 2.5 Automatic represents a snapshot of American automotive engineering in the late 1980s – a focus on practicality, affordability, and comfortable transportation.
