Fiat 131 4 doors (1978 – 1981) vs Renault 18 (1978 – 1984): specs compared
The Fiat 131 4 doors is the more powerful of the two, with up to 140 hp against 125 hp. It is quicker, reaching 100 km/h in 8.3 s against 10.0 s. The Renault 18 has the higher top speed: 195 km/h against 190 km/h. It uses less fuel, from 6.6 L/100 km against 7.9 L/100 km. It is the lighter car, from 900 kg against 1,060 kg. At 4,379 mm, the Renault 18 is 147 mm longer than the Fiat 131 4 doors.
| Specification |
Fiat
131 4 doors
1978 – 1981
|
Renault
18
1978 – 1984
|
|---|---|---|
| Overview | ||
| Origin | Italy | France |
| Documented years | 1978 – 1981 | 1978 – 1984 |
| Body style | 4 Doors · Sedan | — |
| Variants | 7 | 7 |
| Fuel | Diesel, Petrol | Petrol, Diesel |
| Drive | RWD | FWD |
| Gearbox | Automatic · Manual | Manual |
| Performance | ||
| Power | 72 – 140 hp | 63 – 125 hp |
| Torque | 110 – 214 Nm | 105 – 181 Nm |
| 0–100 km/h | 8.3 – 18.0 s | 10.0 – 18.0 s |
| Top speed | 150 – 190 km/h | 150 – 195 km/h |
| Economy | ||
| Fuel economy | 7.9 – 12.0 L/100 km | 6.6 – 8.5 L/100 km |
| Dimensions | ||
| Length | 4,232 mm | 4,379 mm |
| Width | 1,646 mm | 1,689 mm |
| Height | 1,405 mm | 1,400 mm |
| Wheelbase | 2,479 mm | 2,441 mm |
| Curb weight | 1,060 – 1,195 kg | 900 – 1,080 kg |
Ranges cover all variants of each car. The highlight marks the best version per row.

