Chevrolet Vega

Chevrolet Vega: which version to buy and why

The Chevrolet Vega ran as 1 generation from 1970-09-01 to 1977-12-31, as a Sedan 2-doors, with 4 versions that share rear-wheel drive and a front, longitudinal gasoline four-cylinder layout. The buying question is not “which generation,” because there is only one. It is which of the four listed powertrains to pick: 2.0 MT (110 hp), 2.0 AT (110 hp), 2.3 AT (90 hp), or 2.3 AT (72 hp).

The Chevrolet Vega ran as 1 generation from 1970-09-01 to 1977-12-31, as a Sedan 2-doors, with 4 versions that share rear-wheel drive and a front, longitudinal gasoline four-cylinder layout. The buying question is not “which generation,” because there is only one. It is which of the four listed powertrains to pick: 2.0 MT (110 hp), 2.0 AT (110 hp), 2.3 AT (90 hp), or 2.3 AT (72 hp). Every number below is taken from that catalogue set; 0–100, top speed, fuel use, weights, tank, and wheels are not measured, so they cannot decide the purchase.

Generations

1 generation (1970-09-01–1977-12-31) is the whole model. Body: Sedan 2-doors. Versions: 4. There is no later generation to “wait for,” and no restyle listed as a separate generation. Chassis language is the same on all four: Independent, spring front and Independent, spring rear, RWD, engine Front, longitudinal. What changes is displacement, peak power, peak torque, the rpm at those peaks, and whether the gearbox is Manual or Automatic.

Engines and specs

Two names collide: both larger engines are labelled 2.3 AT. They are not the same car. Separate them by power: 2.3 AT 90 hp versus 2.3 AT 72 hp.

Boost, valves per cylinder, and feed system are not measured on every row. Fuel grade is 92 on every row. Cylinder count is 4, arrangement Inline, on every row. Do not treat a missing boost field as “no turbo” or as “has turbo”; it is simply not measured.

Performance and economy

• 0–100: not measured on 2.0 MT, 2.0 AT, 2.3 AT (90 hp), and 2.3 AT (72 hp).
• Top speed: not measured on all four.
• City / highway / combined consumption: not measured on all four.
• CO2 and eco class: not measured on all four.

You cannot rank mpg from this file. You can rank how the engines are specified. 2.0 MT and 2.0 AT make peak power at 5600 rpm and peak torque at 4800 rpm. Both 2.3 AT rows make peak power at 4400 rpm. The 90 hp 2.3 AT peaks torque at 2400 rpm; the 72 hp 2.3 AT peaks torque at 2000 rpm. That is a 2400 rpm gap in power peak between the 2.0-litre pair and the 2.3-litre pair (5600 − 4400), and a 2400 rpm gap in torque peak between 2.0 MT/2.0 AT (4800) and 2.3 AT 90 hp (2400). The 72 hp 2.3 AT sits another 400 rpm lower on torque peak (2400 − 2000).

Specific output from the given figures:

• 2.0 MT / 2.0 AT: 110 hp ÷ 2.000 L = 55.0 hp/L; 145 Nm ÷ 2.000 L = 72.5 Nm/L.
• 2.3 AT (90 hp): 90 hp ÷ 2.287 L ≈ 39.4 hp/L; 184 Nm ÷ 2.287 L ≈ 80.5 Nm/L.
• 2.3 AT (72 hp): 72 hp ÷ 2.287 L ≈ 31.5 hp/L; 136 Nm ÷ 2.287 L ≈ 59.5 Nm/L.

The 2.0-litre pair is the power-density choice. The 90 hp 2.3 AT is the torque-density choice. The 72 hp 2.3 AT loses on both densities.

Dimensions and weight

• Kerb weight: not measured on all four versions.
• Gross weight: not measured on all four.
• Ground clearance: not measured on all four.
• Fuel tank: not measured on all four.
• Wheels: not measured on all four.

Weight per horsepower cannot be calculated. Suspension type does not split the field: Independent, spring / Independent, spring on 2.0 MT, 2.0 AT, 2.3 AT (90 hp), and 2.3 AT (72 hp). Drive is RWD on all four. Body is Sedan 2-doors for the generation. A “lighter” or “roomier” pick is not supported by this dataset.

Which version to choose

There is 1 generation, so generation-to-generation change is zero in the file: same start 1970-09-01, same stop 1977-12-31, same body, same drive, same cylinder count and layout, same fuel 92. Extra money, if it exists in the market, is not in this catalogue. What the numbers buy is engine output and gearbox type.

If you want the highest listed power: 2.0 MT or 2.0 AT. Both are 110 hp / 80 kW. That is 20 hp / 14 kW more than 2.3 AT (90 hp) and 38 hp / 28 kW more than 2.3 AT (72 hp). Displacement is 2000 cc, 287 cc smaller than the 2287 cc engines. You are not buying cubic centimetres; you are buying the peak horsepower figure. Peak arrives 1200 rpm higher than on either 2.3 AT (5600 vs 4400).

If you want a clutch: only 2.0 MT. It is the sole Manual row, 3 speeds. 2.0 AT, 2.3 AT (90 hp), and 2.3 AT (72 hp) are Automatic, 3 speeds. 2.0 MT and 2.0 AT are otherwise identical in the table: 110 hp, 145 Nm, 2000 cc, Gasoline, 4 Inline, Front, longitudinal, RWD, boost not measured. The arithmetic gap between those two is 0 hp and 0 Nm. The only listed difference is Manual versus Automatic. Pick 2.0 MT if the pedal is the point; pick 2.0 AT if the same 110 hp / 145 Nm engine must be Automatic.

If you want the highest listed torque: 2.3 AT (90 hp), not the other 2.3 AT. 184 Nm at 2400 rpm versus 145 Nm on both 2.0-litre cars (+39 Nm) and versus 136 Nm on 2.3 AT (72 hp) (+48 Nm). Power is 90 hp / 66 kW — 20 hp / 14 kW below the 2.0-litre pair, 18 hp / 14 kW above the 72 hp 2.3 AT. Same 2287 cc, same Automatic 3, same RWD. The 90 hp row is the only version that beats the 2.0-litre cars on torque and on torque per litre (~80.5 vs 72.5 Nm/L) while giving up ~15.6 hp/L (55.0 − 39.4).

Do not buy 2.3 AT (72 hp) for “more engine.” It shares the 2287 cc label and the 2.3 AT name with the 90 hp car, but it is the weakest set in the file: 72 hp / 52 kW, 136 Nm. Versus 2.0 MT / 2.0 AT that is −38 hp and −9 Nm despite +287 cc. Versus 2.3 AT (90 hp) that is −18 hp and −48 Nm at the same displacement and the same Automatic 3. Specific output is the lowest: ~31.5 hp/L and ~59.5 Nm/L. Torque peak at 2000 rpm is the lowest rpm peak in the set, but the amount of torque is also the lowest. The extra displacement does not buy extra output here.

Gear count does not split the field. All four list 3 speeds. You are not choosing a four-speed versus a three-speed; you are choosing Manual on 2.0 MT versus Automatic on the other three.

Drive, fuel, and chassis do not split the field. RWD, Gasoline, 92, 4 Inline, Front, longitudinal, Independent, spring both ends — identical labels. There is no AWD option and no other body in this generation list.

Practical ranking from the given arithmetic only:

1. 2.0 MT — 110 hp, 145 Nm, only Manual. Highest power and the unique gearbox. Choose this if you want the peak hp figure and a clutch. 2. 2.0 AT — same 110 hp and 145 Nm as 2.0 MT, Automatic. Choose this if 110 hp must be paired with Automatic. Same engine numbers as (1); gearbox is the only listed fork. 3. 2.3 AT (90 hp) — 90 hp, 184 Nm. Choose this if peak torque and low torque-rpm (2400) matter more than the 20 hp you give up versus the 2.0-litre pair. This is the only version that wins the torque column. 4. 2.3 AT (72 hp) — 72 hp, 136 Nm. Same name as (3), 18 hp and 48 Nm down. There is no measured economy, weight, or speed figure that could justify it against the 90 hp 2.3 AT or against either 2.0. On this dataset it is the version to avoid unless a constraint not in the file (parts, paperwork) forces that exact output.

What “extra displacement” buys in this catalogue: +287 cc from 2000 to 2287 does not raise power. It raises torque only on 2.3 AT (90 hp): +39 Nm versus the 2.0-litre pair, at −20 hp. On 2.3 AT (72 hp) the larger engine is weaker in both columns. Paying for “2.3” only makes sense if the car in front of you is the 90 hp 2.3 AT, confirmed by the 90 hp / 184 Nm / 2400 rpm torque line, not by the shared 2.3 AT badge.

Reliability, problems, and mpg are search topics this file does not measure. Do not infer them from horsepower. What is measured is four gasoline RWD Sedan 2-doors variants in one generation, and the only clean splits are 110 vs 90 vs 72 hp, 145 vs 184 vs 136 Nm, 2000 vs 2287 cc, and Manual versus Automatic.