Alfa Romeo 90

Alfa Romeo 90: which version to buy (1984–1987 specs compared)

The Alfa Romeo 90 was built as 1 generation of Sedan from 1984-01-01 to 1987-12-31, with 7 versions, all Manual with 5 gears and RWD. There is no second generation in this catalogue, so the buying choice is not “which era” but which of the seven mechanical packages: two 1.8 MT, two 2.0 MT, two 2.5 MT, and one 2.4 MT.

The Alfa Romeo 90 was built as 1 generation of Sedan from 1984-01-01 to 1987-12-31, with 7 versions, all Manual with 5 gears and RWD. There is no second generation in this catalogue, so the buying choice is not “which era” but which of the seven mechanical packages: two 1.8 MT, two 2.0 MT, two 2.5 MT, and one 2.4 MT. Fuel consumption, CO2, eco class, and wheel sizes are not measured on every version, so those cannot decide the purchase. What can: power, torque, 0–100, top speed, kerb weight, clearance, rear suspension type, injection vs carburetor, and gasoline vs diesel.

People searching “alfa romeo 90s models”, “alfa romeo 90s sedan”, “alfa romeo 90 engine”, “alfa romeo 90 specs”, “alfa romeo 90 2.5 v6”, or “alfa romeo 90 quadrifoglio oro” are looking at this same seven-row list. This article ranks those rows by the numbers given.

Alfa Romeo 90 generations: what actually changed

1 generation (1984-01-01–1987-12-31), Sedan, 7 versions. Restyling is not listed as a separate generation. All seven share the same calendar window, the same 70 L tank, Manual / 5 / RWD, disc brakes front and rear, independent spring front suspension, and no turbo except the diesel. The split inside the generation is not year-to-year: it is two chassis recipes living side by side.

Recipe A (heavier, fully independent rear, 120 mm clearance, 1600 kg gross where measured): 1.8 MT 116 hp, 2.0 MT 132 hp, 2.5 MT 156 hp. Kerb 1200 kg. Engine position Front, longitudinal (measured on these three). Fuel 92. Rear: Independent, spring.

Recipe B (lighter kerb, dependent rear, 125 mm clearance, gross not measured): 1.8 MT 121 hp, 2.0 MT 128 hp, 2.5 MT 150 hp, 2.4 MT 110 hp. Kerb 1080, 1080, 1170, 1250 kg. Engine position not measured. Rear: Dependent, spring.

Arithmetic on those numbers: Recipe A is 120 mm ground clearance vs 125 mm on Recipe B (−5 mm). The three 1200 kg cars are 120 kg heavier than the 1080 kg 1.8 MT 121 hp and 2.0 MT 128 hp, and 30 kg heavier than the 2.5 MT 150 hp. Gross mass is 1600 kg on Recipe A and not measured on Recipe B. If you want the independent rear and a published gross weight, you are shopping Recipe A. If you want less kerb mass and 5 mm more clearance, Recipe B.

Alfa Romeo 90 engine and specs table

Induction: carburetor on both 1.8 MT and on 2.0 MT 128 hp; Distributed injection (multi-point) on 2.0 MT 132 hp and both 2.5 MT. Diesel feed system: not measured. Compression: not measured / 9 / 10 / not measured / 10 / not measured / 18.5. Bore × stroke: not measured except 2.0 MT 128 hp 84 × 90, 2.5 MT 150 hp 88 × 68.3, 2.4 MT 82 × 90.4.

Specific output (hp per litre of the listed displacement): 1.8 MT 116 hp = 65.2 hp/L; 1.8 MT 121 hp = 68.0 hp/L; 2.0 MT 128 hp = 65.2 hp/L; 2.0 MT 132 hp = 66.2 hp/L; 2.5 MT 150 hp = 60.2 hp/L; 2.5 MT 156 hp = 62.6 hp/L; 2.4 MT 110 hp = 46.0 hp/L. The densest gasoline engine on paper is the lighter 1.8 MT 121 hp. The V-shaped sixes give more total horsepower at lower hp/L. The turbo diesel is last on specific power and first on torque.

Performance, 0–100, top speed, mpg

City / highway / combined consumption: not measured on all seven. MPG cannot choose a version here. 0–100 and top speed can.

Fastest 0–100: 2.5 MT 150 hp at 8.5 s. Highest top speed: 2.5 MT 156 hp at 203. Lowest mass per horsepower: 2.5 MT 156 hp at 7.69 kg/hp, then 2.5 MT 150 hp at 7.80. Slowest 0–100 and second-lowest top speed: 1.8 MT 116 hp (12 s, 180). Slowest top speed: 2.4 MT (178).

Same badge, different cars: the two 1.8 MT share 1779 cc, carburetor, 92, 4 Inline, No boost. The 121 hp car is +5 hp, +1 Nm, −2 s to 100 (12 vs 10), +7 km/h (180 vs 187), −120 kg (1200 vs 1080), +5 mm clearance, and a Dependent, spring rear instead of Independent, spring. The 116 hp car is the only 1.8 MT with a published 1600 kg gross and Front, longitudinal layout.

The two 2.0 MT look closer on the badge than on the stopwatch. Displacement 1962 vs 1995 (+33 cc on the 132 hp car). Power 128 vs 132 (+4 hp). Torque 183 vs 190 (+7 Nm). Top speed is the same 190. 0–100 is 9.2 s on the 128 hp carburetor 95 car versus 11 s on the 132 hp injection 92 car — 1.8 s slower despite 4 more hp, because kerb mass is 1080 vs 1200 (+120 kg, +11.1%). Compression 10 is published only on 2.0 MT 128 hp. If “2.0” means the quicker 0–100, that is 2.0 MT 128 hp. If “2.0” means multi-point injection and independent rear, that is 2.0 MT 132 hp.

The two 2.5 MT are the 6 V-shaped pair. Same 2492 cc, same multi-point injection, No boost. 150 vs 156 hp (+6). Torque not measured vs 210 Nm @ 4000. 0–100 8.5 vs 8.7 s (the 150 hp car is 0.2 s quicker). Top speed 200 vs 203 (+3 on the 156 hp car). Kerb 1170 vs 1200 (+30 kg on 156 hp). Clearance 125 vs 120. Fuel 95 vs 92. Searches for “alfa romeo 90 2.5 quadrifoglio oro” / “2.5 v6” map onto this pair in the data; the catalogue does not attach a Gold Cloverleaf name to a row, so the buy is still 2.5 MT 150 hp vs 2.5 MT 156 hp.

2.4 MT is the only Diesel, only Turbo, only 5 Inline, only peak torque 235 Nm, and the only peak torque rpm as low as 2400 (gasoline peaks at 4000 where measured). Versus the weakest gasoline 1.8 MT 116 hp: −6 hp but +68 Nm, −1 s to 100 (11 vs 12), −2 km/h top speed (178 vs 180), +50 kg. Versus 2.5 MT 156 hp: −46 hp, +25 Nm, +2.3 s to 100, −25 km/h, +50 kg. Compression 18.5 is the highest published. Fuel consumption still not measured, so “diesel mpg” is not a fact here.

Dimensions, weight, tank, clearance

Tank 70 L on all seven. Wheels not measured on all seven. Gross 1600 kg on 1.8 MT 116 hp, 2.0 MT 132 hp, 2.5 MT 156 hp; not measured on the other four. Payload on those three: 1600 − 1200 = 400 kg.

Kerb range: 1080 (1.8 MT 121 hp and 2.0 MT 128 hp) to 1250 (2.4 MT). Spread 170 kg. Clearance only two values: 120 or 125 mm. Brakes Disc front and rear on all (English label as given). Front suspension Independent, spring on all.

If ground clearance is the filter: 125 mm = 1.8 MT 121 hp, 2.0 MT 128 hp, 2.5 MT 150 hp, 2.4 MT. 120 mm = the three 1200 kg cars. If a published gross mass is the filter: only the three Recipe A cars.

Which Alfa Romeo 90 version to choose

There is no price in this dataset, so “extra money” is extra displacement, extra cylinders, injection instead of carburetor, and independent rear instead of dependent — paid in kilograms and (where measured) in 0–100.

Buy 2.5 MT 150 hp if the question is the lowest 0–100. 8.5 s, 200 top speed, 1170 kg, 7.80 kg/hp, 6 V-shaped, multi-point, 95, 125 mm, dependent rear. Torque, power rpm, engine position, and gross mass are not measured. It is 0.2 s quicker than the 156 hp twin and 0.7 s quicker than 2.0 MT 128 hp.

Buy 2.5 MT 156 hp if the question is peak power, peak listed top speed, and independent rear. 156 hp, 210 Nm, 203 km/h, 7.69 kg/hp (best mass/power in the table), Front, longitudinal, 92, 1200 kg / 1600 kg, 120 mm. You give up 0.2 s and 5 mm clearance versus 2.5 MT 150 hp and gain 6 hp, a published 210 Nm, +3 km/h, and independent rear.

Buy 2.0 MT 128 hp if the question is the quickest four-cylinder. 9.2 s, 190 km/h, 1080 kg, 8.44 kg/hp, carburetor, 95, compression 10, 84 × 90, 125 mm, dependent rear. Versus 2.0 MT 132 hp it is −4 hp but −120 kg and 1.8 s faster to 100. Versus 2.5 MT 150 hp it is −22 hp, −90 kg, and +0.7 s.

Buy 2.0 MT 132 hp if the four-cylinder must have multi-point injection and independent rear. 132 hp, 190 Nm, 1995 cc, 92, 1200/1600 kg, 120 mm, 11 s, 190 km/h. Same top speed as 2.0 MT 128 hp; worse 0–100; only 4 hp more. The “buy” is the chassis and injection, not the stopwatch.

Buy 1.8 MT 121 hp if the question is the lightest gasoline car and the highest hp/L. 1080 kg, 68.0 hp/L, 10 s, 187 km/h, 8.93 kg/hp, carburetor, 92, 125 mm. Versus 1.8 MT 116 hp: +5 hp, −120 kg, −2 s, +7 km/h. You drop independent rear and the 1600 kg gross figure.

Buy 1.8 MT 116 hp only if you specifically want the 1779 cc car with independent rear and a published gross weight. It is the slowest gasoline 0–100 (12 s), 180 km/h, 10.34 kg/hp. Versus its 121 hp twin it is a 120 kg and 2 s penalty for the independent rear.

Buy 2.4 MT if the question is torque and diesel/turbo, not speed. 235 Nm @ 2400, Turbo, 5 Inline, 110 hp, 11 s, 178 km/h, 1250 kg (heaviest), 11.36 kg/hp (worst), 125 mm, dependent rear. Consumption not measured — do not assume a fuel-economy win from the data.

What the next step up buys (gasoline, 0–100): 1.8 MT 116 hp → 1.8 MT 121 hp: −2.0 s, −120 kg. 1.8 MT 121 hp → 2.0 MT 128 hp: −0.8 s, same 1080 kg, +7 hp, +183 cc. 2.0 MT 128 hp → 2.5 MT 150 hp: −0.7 s, +90 kg, +22 hp, 4 Inline → 6 V-shaped. 2.5 MT 150 hp → 2.5 MT 156 hp: +0.2 s (slower), +30 kg, +6 hp, +3 km/h, independent rear.

Alfa Romeo 90 vs a later 75 is a different model and is not in this dataset; comparison stops at these seven rows. Interior, race-car use, and asking prices are not measured here. The catalogue answer to “which version”: 2.5 MT 150 hp for 0–100, 2.5 MT 156 hp for power + independent rear + 203 km/h, 2.0 MT 128 hp for the lightest quick four-cylinder, 2.4 MT for 235 Nm diesel torque, 1.8 MT 121 hp for mass and hp/L, and the 116 hp / 132 hp cars only when the independent-rear Recipe A is the point of the purchase.