Fiat Duna

Fiat Duna: which version to buy and why

The Fiat Duna was sold as 1 generation (1987–1991), Sedan, with 6 listed versions and three powertrains: two 1.1 MT at 58 hp, two 1.3 MT at 67 hp, and two 1.7 MT at 60 hp. There is no later generation to “step up to,” so the buying choice is which engine, gearbox, and measured-spec record you take — not which facelift. All six are Manual, FWD, Inline 4, No boost.

The Fiat Duna was sold as 1 generation (1987–1991), Sedan, with 6 listed versions and three powertrains: two 1.1 MT at 58 hp, two 1.3 MT at 67 hp, and two 1.7 MT at 60 hp. There is no later generation to “step up to,” so the buying choice is which engine, gearbox, and measured-spec record you take — not which facelift. All six are Manual, FWD, Inline 4, No boost. Fuel consumption is not measured on every version. The 1.3 MT is the strongest and fastest where top speed is measured; the 1.7 MT is the only diesel and the only version with a measured 0–100 figure; the 1.1 MT is the lightest and the only petrol with a measured torque figure.

Which Duna version to buy

Use the numbers, not the badge.

Buy 1.3 MT (67 hp) if you want the most power and the highest measured top speed. It is 67 hp (49 kW) at 5500 rpm from 1301 cc Gasoline. Versus 1.1 MT that is +9 hp (+15.5%) from +185 cc. Versus 1.7 MT it is +7 hp. Where top speed is measured, 1.3 MT is 160 against 140 for 1.1 MT (+20) and 155 for 1.7 MT (+5). Gearbox is Manual 5 versus 4 on 1.1 MT. Kerb weight where measured is 940 — +5 versus 1.1 MT, −5 versus 1.7 MT. Weight per horsepower: 940 / 67 ≈ 14.0 kg/hp, the lowest (best) of the three measured kerb figures. Specific output: 67 / 1.301 ≈ 51.5 hp/L, almost the same as the 1.1. Torque, 0–100, fuel, valves per cylinder, injection, and fuel grade on 1.3 MT are not measured.

Buy 1.7 MT (60 hp) if you need diesel and the only measured 0–100. It is 60 hp (44 kW) at 4600 rpm, 100 Nm at 2900 rpm, 1698 cc Diesel, Manual 5, fuel Diesel. Peak power arrives 1100 rpm earlier than 1.1 MT and 900 rpm earlier than 1.3 MT. Torque versus 1.1 MT: +13 Nm (+14.9%) at 100 rpm lower. Versus 1.3 MT, torque on the petrol is not measured, so you cannot rank them. 0–100 is 15.5 on one 1.7 MT record; every other version is not measured. Top speed where measured: 155 — +15 versus 1.1 MT, −5 versus 1.3 MT. Kerb 945 (+10 vs 1.1 MT, +5 vs 1.3 MT). Weight per hp: 945 / 60 = 15.75 kg/hp — heavier per hp than 1.3 MT, slightly lighter per hp than 1.1 MT (935 / 58 ≈ 16.1 kg/hp). Specific output: 60 / 1.698 ≈ 35.3 hp/L, well below both petrols. Valves per cylinder: 2. Injection: not measured.

Buy 1.1 MT (58 hp) if you want the lightest car, measured petrol torque, and single-point injection on the record. It is 58 hp (43 kW) at 5700 rpm, 87 Nm at 3000 rpm, 1116 cc Gasoline, Manual 4, fuel 95, Central injection (single-point or single- point), 2 valves per cylinder. It is the only petrol with torque, injection, fuel grade, and valves all filled in. It is also the only 4-speed. Top speed where measured: 140, the lowest. Kerb 935, the lowest. Tank 55 where measured — same as the other fully filled records. Specific output 58 / 1.116 ≈ 52.0 hp/L, highest of the three. 0–100 and fuel use: not measured.

There is no automatic, no AWD, no turbo, and no second generation. “Extra money” in this catalogue is extra displacement, extra gears, or diesel — not extra body styles.

Fiat Duna generations compared (only one)

1 generation ran 1987-01-01 to 1991-12-31, Sedan, 6 versions. Years do not differ by engine: every modification uses the same start and stop. Nothing in the data is a restyle or a later generation, so you cannot buy a “newer Duna” with more power or a different body. The six lines are two records each of 1.1 MT, 1.3 MT, and 1.7 MT. Where a second record of the same name and same power leaves top speed, tank, or kerb not measured, treat it as a thinner spec sheet of the same powertrain, not a different car.

Fiat Duna engine specs (all 6 versions)

Exact names as in the data. Same name, same power: tell them apart by which fields are measured.

Valves per cylinder: 2 on both 1.1 MT and both 1.7 MT; not measured on both 1.3 MT. Injection: Central injection (single-point or single- point) on both 1.1 MT; not measured on 1.3 MT and 1.7 MT. Fuel grade: 95 on 1.1 MT, Diesel on 1.7 MT, not measured on 1.3 MT. Front brakes Disc, front suspension Independent, spring on all six. Rear brakes, rear suspension, engine position: not measured on all six.

Performance, mpg, and what the extra displacement buys

0–100: only 1.7 MT at 15.5 (one of the two 1.7 MT records). The other 1.7 MT, both 1.1 MT, and both 1.3 MT: not measured. You cannot say the 67 hp petrol is quicker off the line from this catalogue.

Top speed: 1.3 MT 160, 1.7 MT 155, 1.1 MT 140 on the first record of each name. The second record of each name: top speed not measured. Spread petrol to petrol: 20. Diesel sits in the middle.

Fuel consumption (mpg / city / highway / combined): not measured on all six. CO2 and eco class: not measured on all six. Do not infer economy from diesel versus petrol here.

What +185 cc buys (1.1 MT → 1.3 MT): +9 hp, +1 gear (4 → 5), +20 top speed where both are measured, +5 kg kerb (935 → 940). You lose the measured torque, injection, 95 fuel label, and 2-valve figure — those are not measured on 1.3 MT. Power per litre is almost unchanged (52.0 vs 51.5 hp/L). Weight per hp improves (16.1 → 14.0 kg/hp) because power rose faster than mass.

What +582 cc and diesel buy (1.1 MT → 1.7 MT): +2 hp only, +13 Nm, +1 gear, +15 top speed, +10 kg, fuel Diesel instead of 95, and the only 0–100 number (15.5). Specific output drops (52.0 → 35.3 hp/L). Peak power rpm drops 5700 → 4600.

1.3 MT versus 1.7 MT: petrol wins peak hp (67 vs 60) and measured top speed (160 vs 155). Diesel wins measured torque (100 Nm; petrol not measured), earlier peak power rpm, and the only 0–100. Both are Manual 5, FWD. Displacement gap 397 cc. Mass gap 5 kg where both kerb figures exist.

Dimensions, weight, tank — which version is lighter

Wheel size and ground clearance: not measured on all six. Gross weight: not measured on all six. You cannot rank ride height or tyre size.

Kerb weight (where measured): 1.1 MT 935, 1.3 MT 940, 1.7 MT 945. The second record of each name: kerb not measured. Spread across the range is 10 kg. That is why weight-per-hp ranking is driven by horsepower, not by mass.

Tank: 55 on the first 1.1 MT, first 1.3 MT, and first 1.7 MT. The second record of each name: tank not measured. Range in km cannot be calculated: consumption is not measured.

Reliability and problems — what the spec sheet does and does not say

This catalogue has no failure rates, no service intervals, and no price. What it does show: every version is No boost, Manual, FWD, Inline 4. The 1.1 MT is the only petrol with Central injection (single-point or single- point) written down. The 1.7 MT is the only Diesel. If you need a documented injection type, the data points at 1.1 MT. If you need diesel, only 1.7 MT. If you need five gears and the highest hp, only 1.3 MT.

Short pick list

• Most hp, highest measured top speed, lightest per hp: 1.3 MT (67 hp, 160, ~14.0 kg/hp). Accept not measured torque, 0–100, and mpg.
• Only diesel, only measured 0–100, most measured torque: 1.7 MT (60 hp, 100 Nm, 15.5 to 100, 155). Accept 35.3 hp/L and +10 kg versus 1.1 MT.
• Lightest, only 4-speed, only petrol with full torque/injection/fuel labels: 1.1 MT (58 hp, 87 Nm, 935 kg, 140). Accept the lowest top speed and one fewer gear.

All six names stay 1.1 MT, 1.3 MT, and 1.7 MT as in the database. The duplicate lines of each name share power; they differ only in which of tank, kerb, and top speed are filled versus not measured.