The Fiat 1400 is a model of car produced by Italian automotive manufacturer Fiat between 1950 and 1958. The car was introduced at the 1950 Geneva Motor Show. It was the first chassisless Fiat automobile. In 1953 the introduction of a diesel version with a 1900 cc engine marked another Fiat first, although the diesel version was known as the 1400 Diesel.
Also in 1953 the Fiat 1400 became the first model to be produced by SEAT in Spain and the first model of passenger car produced by Crvena zastava in FNRY.
The Fiat 1900, introduced in 1952, was an upmarket model that used the same body as the 1400, but came with a 1.9 litre engine and more standard features. The petrol-engined Fiat 1900 A, introduced in 1954, now offered a claimed 70 bhp. It also featured a hydraulically operated clutch and, unusually for that time, a five speed column shifted manual transmission.

- The engine had a 1,4 ltr capacity and a power output of 44 hp (33 kW) with 4400 rpm.
- The larger engine offered from 1952 had a 1,9 ltr capacity and a power output of 70 hp (52 kW) with 4400 rpm.
- It had a maximum speed of 120 km/h (75 mph) (1400 cc version).
- Unloaded weight of 1,120 kg (2,469 lb).
- Hand brake handle under instrument panel,
- Retaining loops for front seat passengers at the roof and at the backrests,
- Armrests in the doors
Fuel filler access was through a trap door in the floor of the trunk/boot, thus keeping the fuel safe once the car was closed and locked
- The 1900 came standard with a radio and a rudimental "trip computer" that showed the average speed.

About 179.000 1400s and 19.000 1900s were built.