Pontiac Montana

Pontiac Montana: which version to buy

The Pontiac Montana is a minivan sold in two generations (1997–2005 and 2005–2009). This page is not a model history. It is a buyer’s comparison of the nine catalogue versions, using only the measured numbers in the spec cards: horsepower, torque, displacement, weight, 0–100, top speed, tank, and ground clearance. Where a cell is empty in the data, it is written as not measured.

The Pontiac Montana is a minivan sold in two generations (1997–2005 and 2005–2009). This page is not a model history. It is a buyer’s comparison of the nine catalogue versions, using only the measured numbers in the spec cards: horsepower, torque, displacement, weight, 0–100, top speed, tank, and ground clearance. Where a cell is empty in the data, it is written as not measured.

People looking at a Pontiac Montana van, a Montana SV6-era second-generation car, or a 2004/2005 used listing are usually choosing between the first-generation 3.4 AT and the second-generation 3.5 AT / 3.9 AT. Those names are the exact catalogue names and are used unchanged below.

Pontiac Montana generations compared (what actually changed)

1 generation (1997-01-01 – 2005-12-31) is a Minivan with 4 versions, all named 3.4 AT. Every one uses a Gasoline V-shaped 6-cylinder, 2 valves per cylinder, No boost, Front, transverse, Distributed injection (multi-point), Automatic 4-speed, 3350 cm³, 180 hp (132 kW) at 5200 rpm, 278 Nm at 4000 rpm, compression 9.5, bore × stroke 92 × 84, fuel 92, 76 L tank, 165 mm ground clearance, Independent, spring front, Disc front, Drum rear.

The four 3.4 AT cards split on drive and mass, not on power:

2 generation (2005-01-01 – 2009-12-31) is a Minivan with 5 versions: four 3.5 AT and one 3.9 AT. All keep Gasoline, V-shaped 6, 2 valves, No boost, Front, transverse, Distributed injection (multi-point), Automatic 4, compression 9.8, 95 L tank. Ground clearance, where listed, drops to 140 mm.

Arithmetic on generation change:

• Displacement: 3.5 AT is 3498 − 3350 = +148 cm³ versus 3.4 AT; 3.9 AT is 3880 − 3350 = +530 cm³.
• Power: 204 − 180 = +24 hp on 3.5 AT (+13.3%); 240 − 180 = +60 hp on 3.9 AT (+33.3%).
• Torque: 300 − 278 = +22 Nm on most 3.5 AT; 293 − 278 = +15 Nm on the 5600-rpm 3.5 AT; 325 − 278 = +47 Nm on 3.9 AT.
• Tank: 95 − 76 = +19 L.
• Ground clearance: 165 − 140 = −25 mm (second generation sits lower where both are measured).
• Gearbox stays Automatic 4 on every version in both generations. Drive is still FWD or AWD; there is no third layout in the data.

Pontiac Montana engine options (specs table)

Version names match the database. Same name is split by power/rpm/drive so each row is a unique card.

Power per litre (hp ÷ displacement in litres):

• 3.4 AT: 180 ÷ 3.350 = 53.7 hp/L
• 3.5 AT (all 204 hp cards): 204 ÷ 3.498 = 58.3 hp/L (+4.6 hp/L vs 3.4)
• 3.9 AT: 240 ÷ 3.880 = 61.9 hp/L (+8.2 vs 3.4, +3.6 vs 3.5)

The 3.9 AT is the only engine that makes peak torque at 2800 rpm instead of 3800–4000. That is 1000–1200 rpm earlier than the 3.5 AT 300 Nm tune and 1200 rpm earlier than the 3.4 AT. For a van, that is the largest measured difference in the powertrain set.

The two 3.5 AT power ratings are both 204 hp, so they cannot be split by horsepower. They split by rpm and torque: 204 hp at 5800 with 300 Nm at 3800, versus 204 hp at 5600 with 293 Nm at 4000. Difference: −7 Nm and −200 rpm on the power peak. Fuel on the 5600-rpm card is not measured; on the 5800-rpm cards it is 92.

There is no engine-swap, oil-capacity, or engine-bay measurement in the data. Those searches cannot be answered from this catalogue.

Pontiac Montana horsepower, 0–100, and top speed (what extra power buys)

Measured acceleration exists on three cards only.

What the extra 24 hp on that 3.5 AT actually buys versus the light 3.4 AT:

• Power: +24 hp.
• Weight: 1965 − 1770 = +195 kg.
• 0–100: 10.5 − 10.0 = +0.5 s slower, not faster.
• Top speed: 177 versus 178 = −1 km/h.
• kg/hp: 9.63 versus 9.83 = 0.20 kg/hp better on paper, but the measured sprint is still slower.

So if the buying question is “is the second-generation 3.5 AT quicker than a 1770 kg first-generation 3.4 AT?”, the only paired numbers say no: 10.5 s vs 10 s.

If the question is “is the second-generation 3.5 AT lighter per horse than a 2065 kg 3.4 AT?”, yes: 9.63 vs 11.47 kg/hp. The heavy first-generation cards also lose 8 km/h of top speed (170 vs 178) against the light ones. That 2065 − 1770 = 295 kg gap is larger than the generation jump in power.

3.9 AT versus the measured 3.5 AT (204 hp, 1965 kg): +36 hp, +32 Nm versus the 293 Nm tune (or +25 Nm versus 300 Nm). 0–100, top speed, and curb weight for 3.9 AT are not measured. You cannot claim it is faster from this catalogue. You can only claim it has the highest hp, Nm, and hp/L.

Fuel consumption (city / highway / combined) is not measured on all nine versions. CO2 and eco class are not measured on all nine. A “mpg” comparison between Montana engines is not possible here.

Pontiac Montana weight, tank, clearance, dimensions

Wheel sizes and length / interior dimensions are not measured on every version. Curb weight, gross weight, clearance, and tank are the dimension-adjacent numbers that exist.

Tank. First generation: 76 L on all four 3.4 AT. Second generation: 95 L on all five cards. Range arithmetic without consumption is not possible (consumption not measured). The second generation simply carries 19 L more fuel.

Ground clearance. First generation: 165 mm on all four 3.4 AT. Second generation: 140 mm on four of five cards; the 3.5 AT FWD 293 Nm card lists clearance not measured. If you want the higher van, the first generation is 25 mm taller in the measured set.

Curb weight (Pontiac Montana curb weight / 2004–2006 weight searches).

• Lightest measured: 1770 kg — both 1770 kg 3.4 AT (FWD and AWD).
• Heaviest measured: 2065 kg — both 2065 kg 3.4 AT (FWD and AWD).
• Only second-generation curb weight: 1965 kg — 3.5 AT FWD 293 Nm @ 4000.
• 3.9 AT and the 300 Nm 3.5 AT cards: curb not measured.

Gross weight is measured only on the two 1770 kg 3.4 AT: 2430 kg. Payload arithmetic there: 2430 − 1770 = 660 kg. Gross on the 2065 kg 3.4 AT and on all second-generation versions is not measured, so payload cannot be compared.

Brakes and rear axle (buyer-relevant hardware, not styling). First-generation 3.4 AT 1770 kg: rear Semi-independent, torsion; Drum rear. First-generation 3.4 AT 2065 kg: rear Independent, spring; still Drum rear. Second-generation 3.5 AT FWD 293 Nm: Disc rear as well as Disc front — the only card with rear discs measured. Other gen-2 rear brakes: not measured. Two gen-2 3.5 AT cards also leave rear suspension not measured (the FWD 300 Nm and one AWD 300 Nm).

Which Pontiac Montana version to choose

Use the numbers as a decision tree. Prices are not in the data and are not discussed.

1. Choose first-generation 1770 kg 3.4 AT if the measured sprint and height matter. This is the only Montana with 10 s to 100 km/h, 178 km/h, 165 mm clearance, and 9.83 kg/hp. FWD and AWD share those figures exactly; AWD does not add measured weight or subtract measured speed on this pair. Buy AWD only if you need AWD; the spec card does not show a performance penalty on the 1770 kg pair.

2. Avoid treating the 2065 kg 3.4 AT as the same van. Same 180 hp and same 3.4 AT name, but +295 kg, 11.47 kg/hp, and 170 km/h. 0–100 is not measured. Rear suspension is Independent, spring instead of Semi-independent, torsion. If a listing is a first-generation Montana, the 1770 vs 2065 kg split is larger than FWD vs AWD.

3. Choose second-generation 3.5 AT FWD 293 Nm @ 4000 if you want the only gen-2 card with a full performance line. 204 hp, 10.5 s, 177 km/h, 1965 kg, Disc rear. Versus the light 3.4 AT: +24 hp, +195 kg, +0.5 s, −1 km/h, −19 L less tank wait — tank is larger (95 vs 76). Versus the heavy 3.4 AT: +24 hp and −100 kg (1965 vs 2065), better kg/hp (9.63 vs 11.47), but 0–100 of the heavy 3.4 is not measured so a sprint win is not proven. Fuel grade on this card is not measured.

4. Choose 3.5 AT 300 Nm @ 5800 if you want the 92-octane, 300 Nm tune — and then pick FWD or AWD from the two AWD cards. Power is still 204 hp. Torque is +7 Nm versus the 293 Nm card. Clearance 140 mm, tank 95 L. 0–100, top speed, and curb weight: not measured. The two AWD 3.5 AT 300 Nm cards are identical on power, torque, rpm, displacement, fuel, gearbox, drive, tank, and clearance; they differ only in that one lists rear Independent, spring and the other lists rear suspension not measured. That is not a buying difference you can score in kilograms or seconds.

5. Choose 3.9 AT only if peak output is the criterion. 240 hp, 325 Nm at 2800 rpm, 3880 cm³, 61.9 hp/L, FWD only (no AWD 3.9 AT in the data). Versus 3.5 AT 204 hp: +36 hp (+17.6%), +382 cm³, +25 Nm vs 300 Nm or +32 Nm vs 293 Nm. Drive is FWD only — if you need AWD, 3.9 AT is not in the set. Weight, 0–100, top speed, consumption: not measured. The extra money, if any, cannot be priced here; mechanically it buys displacement and earlier torque, not a measured faster van.

6. Reliability is not measured. No failure rates, oil specs, or problem counts are in the data. A reliability ranking of Montana years would be invention.

Short ranking by what is actually measured

• Fastest measured 0–100: 3.4 AT 1770 kg (FWD or AWD) — 10 s.
• Highest measured top speed: same pair — 178 km/h.
• Highest measured power and torque: 3.9 AT — 240 hp, 325 Nm.
• Best measured kg/hp: 3.5 AT FWD 293 Nm — 9.63 kg/hp.
• Highest measured ground clearance: any first-generation 3.4 AT — 165 mm.
• Largest measured tank: any second-generation version — 95 L.
• Only measured rear discs: 3.5 AT FWD 293 Nm @ 4000.

If a used 2003/2004 Montana is a first-generation 3.4 AT, decide 1770 vs 2065 kg first, then FWD vs AWD. If a 2005–2009 Montana / SV6-period van is the listing, the named choice is 3.5 AT versus 3.9 AT; among 3.5 AT, only the 293 Nm FWD card has a measured 0–100, weight, and rear discs. The rest of the second generation is specified on engine and tank, not on how fast or how heavy the van is.