Pontiac Grand AM

Pontiac Grand AM: Which Version to Buy and Why

The best Pontiac Grand AM version depends on the balance you want between output, fuel consumption, gearbox type, and available specifications. Among the documented cars, the strongest engine is the third-generation 2.3 MT with 180 hp, while the fifth-generation 2.2 AT with 140 hp records the lowest measured combined consumption at 8.1 L/100 km.

The best Pontiac Grand AM version depends on the balance you want between output, fuel consumption, gearbox type, and available specifications. Among the documented cars, the strongest engine is the third-generation 2.3 MT with 180 hp, while the fifth-generation 2.2 AT with 140 hp records the lowest measured combined consumption at 8.1 L/100 km. Buyers wanting the greatest documented torque should consider the fifth-generation 3.4 AT with 175 hp and 279 Nm. The data covers 5 generations, but detailed engine specifications are available only for the third, fourth, and fifth generations; first- and second-generation versions cannot be compared at modification level because no versions are listed for them.

Pontiac Grand AM generations: what changed?

The first-generation Pontiac Grand AM ran from 1973 to 1975 as a Coupe Hardtop. It has 0 documented modifications, so engine output, gearbox, drive, consumption, weight, clearance, tank capacity, and wheel sizes are all not measured in this dataset. It cannot be ranked against later Grand AM versions using specifications.

The second generation ran from 1978 to 1980 with a Coupe body and also has 0 documented modifications. Its engine, performance, economy, weight, clearance, tank, and wheel specifications are not measured, making it unsuitable for a numerical buying comparison.

The third-generation Coupe, produced from 1984 to 1991, has 14 modifications, of which 12 are detailed here. It offers the widest documented power spread: from 90 hp in the 2.5 MT and 2.5 AT to 180 hp in the 2.3 MT, a difference of 90 hp. It is also the only documented generation with a boosted option: the 2.0 MT and 2.0 AT use Turbo engines producing 165 hp and 200 Nm. All listed third-generation versions are FWD, and buyers can choose Manual or Automatic gearboxes.

The fourth-generation Coupe ran from 1992 to 1998 and has 16 modifications, with 12 shown in the supplied version list. Its documented engines span 120–160 hp, narrowing the output range compared with the third generation. The available version names are 2.3 MT, 2.3 AT, 2.4 MT, 2.4 AT, 3.1 AT, and 3.3 AT, with repeated 2.3 MT and 2.3 AT entries distinguished below by power. Independent spring suspension is specified at both ends for every listed version.

The fifth-generation Coupe, produced from 1998 to 2005, has 12 modifications. Its range is concentrated around 2.2 MT, 2.2 AT, 2.4 MT, 2.4 AT, and 3.4 AT. The two distinct 3.4 AT specifications produce 170 hp or 175 hp. Compared with the fourth generation’s maximum of 160 hp, the later generation adds up to 15 hp and raises the maximum documented torque from 271 Nm to 279 Nm. Ground clearance also increases from 140 mm to 145 mm.

Pontiac Grand AM engine options and specs

Repeated entries with identical names and power reflect separate records with different tank capacities or kerb weights. They remain listed because every supplied modification must be identifiable.

Power per litre helps separate engine size from output. The third-generation 2.0 MT and 2.0 AT each produce approximately 82.7 hp/L, the highest result among the documented engines. The third-generation 2.3 MT with 180 hp follows at approximately 79.6 hp/L. In the fifth generation, the 2.2 MT and 2.2 AT deliver approximately 64.0 hp/L, while the 3.4 AT with 175 hp produces approximately 52.2 hp/L. The latter prioritizes torque: its 279 Nm is 76 Nm more than the fifth-generation 2.2 versions’ 203 Nm.

Pontiac Grand AM performance and fuel economy

Acceleration from 0–100 km/h is not measured for every listed Pontiac Grand AM version. A top speed of 190 km/h is recorded for several fourth- and fifth-generation versions, but many third-generation and some fourth-generation top-speed values are not measured.

In the fourth generation, measured consumption is 9.8 L/100 km city, 7.3 L/100 km highway, and 8.4 L/100 km combined for the documented 5-speed Manual versions with figures, as well as the 3.1 AT and 3.3 AT records. The documented 3-speed Automatic 2.3 AT and 2.4 AT versions return 9.4 L/100 km city, 7.1 L/100 km highway, and 8.1 L/100 km combined. Other repeated fourth-generation entries have consumption not measured.

For the fifth generation, both 2.2 AT records use 9.4 L/100 km city, 7.1 L/100 km highway, and 8.1 L/100 km combined. Both 2.2 MT records use 9.8 L/100 km city, 7.3 L/100 km highway, and 8.4 L/100 km combined. Consumption for every 2.4 MT, 2.4 AT, and 3.4 AT with 170 hp record is not measured. Both 3.4 AT with 175 hp records are rated at 11.7 L/100 km city, 8.1 L/100 km highway, and 9.8 L/100 km combined.

Compared with the fifth-generation 2.2 AT, the 3.4 AT with 175 hp adds 35 hp and 76 Nm, while measured combined consumption rises by 1.7 L/100 km. That makes the 2.2 AT the data-led economy choice and the 3.4 AT with 175 hp the torque choice.

Pontiac Grand AM dimensions, weight, clearance, and tank capacity

Exterior dimensions and wheel sizes are not measured for all listed generations and versions. Gross weight is also not measured throughout the supplied data.

Third-generation kerb weight and tank capacity are not measured. Ground clearance is 140 mm for every listed third-generation version, and wheel sizes are not measured.

Fourth-generation ground clearance is 140 mm, while tank capacity is either 54 L or 57 L depending on the repeated record. A kerb weight of 1,395 kg is listed for several versions, while the repeated 2.3 MT with 120 hp and 2.3 MT with 160 hp records using a 57 L tank weigh 1,415 kg. Other fourth-generation kerb weights are not measured. Wheel sizes are not measured.

Fifth-generation ground clearance is 145 mm, and tank capacity is either 54 L or 57 L. Documented kerb weights range from 1,385 kg for both 2.4 AT records to 1,430 kg for the 3.4 AT with 170 hp and 54 L tank, a difference of 45 kg. Wheel sizes are not measured.

Where weight is available, the fifth-generation 2.4 AT has approximately 9.2 kg per hp, while the 3.4 AT with 170 hp and 54 L tank has approximately 8.4 kg per hp. The fifth-generation 2.2 MT with 57 L tank and 2.2 AT with 57 L tank each have approximately 10.0 kg per hp at 1,395 kg and 140 hp.

Which Pontiac Grand AM version should you buy?

Choose the fifth-generation 2.2 AT if measured fuel consumption matters most. It combines 140 hp, 203 Nm, a 4-speed Automatic gearbox, and 8.1 L/100 km combined consumption. Compared with the 2.2 MT, it records 0.3 L/100 km lower combined consumption while retaining the same power and torque.

Choose the fifth-generation 2.4 AT if you want the lightest documented fifth-generation configuration. At 1,385 kg and 150 hp, it is 10 kg lighter and 10 hp more powerful than the 1,395 kg, 140 hp 2.2 records with the 57 L tank. Its fuel consumption is not measured, however, so the data cannot establish its running-cost advantage.

Choose the fifth-generation 3.4 AT with 175 hp if torque is the priority. Its 279 Nm exceeds the 3.4 AT with 170 hp by 15 Nm, despite identical 3,350 cc displacement. It also adds 5 hp. The trade-off is measured combined consumption of 9.8 L/100 km, versus 8.1 L/100 km for the fifth-generation 2.2 AT.

Choose the fourth-generation 3.3 AT if you want the strongest documented fourth-generation torque figure. It develops 160 hp and 271 Nm, giving it 61 Nm more torque than the fourth-generation 2.3 MT with 160 hp, while power remains equal. Both have measured combined consumption of 8.4 L/100 km in the applicable records.

Choose the third-generation 2.3 MT with 180 hp for the highest documented Grand AM horsepower. It delivers 15 hp more than the Turbo 2.0 MT, although its 190 Nm is 10 Nm lower. Choose the Turbo 2.0 MT instead if power per litre matters: approximately 82.7 hp/L, compared with approximately 79.6 hp/L for the 2.3 MT with 180 hp. Fuel consumption, kerb weight, and top speed are not measured for both, so their comparison must remain limited to the available engine figures.

For the most balanced evidence-based selection, the fifth-generation 2.2 AT is the clearest choice because power, torque, consumption, weight, clearance, and tank capacity are all documented. For maximum torque, take the fifth-generation 3.4 AT with 175 hp; for maximum horsepower, take the third-generation 2.3 MT with 180 hp.