Fiat 1400

This was the first Fiat car that used a monocoque type body, introduced at the 1950 Geneva Motor Show. 

The car received a seires of improvements until production stopped in 1958. A diesel engine was introduced in 1953, a 1900 cc model which was another first for Fiat. The engine is however called the 1400 in order to avoid confusion with the then-newly released 1900 petrol engine. When production ceased, some 77,000 cars were produced.

First car on the left is a Fiat 1400. Next could be a 1950s vintage light US truck but it cannot be sure yet which one. Next, on the right, is a 1954 Chevrolet bus. The wagon type vehicle in front the modified truck is most likely a Chevrolet Suburban from around 1955.

Source :

http://www.autoevolution.com/