The original Fiat 500 weighed 1100lbs. The new one shares the underpinnings with the Ford Ka. Both weigh in at 1800-2000lbs. And there is the original Mini, a heavyweight weighing in at around 1400lbs.
I should also mention the famous Citroen 2CV here. It was another simple, tough form of transport. Like the 500, it still has a very loyal following. Weighed in dripping wet at 1200lbs.
From Wikipedia: It was designed to move the French peasantry on from horses and carts. It is considered one of Citroën's most iconic cars. In 1953, 'Autocar' in a technical review of the car wrote of, "...the extraordinary ingenuity of this design, which is undoubtedly the most original since the Model T Ford."[3] It was described by CAR magazine journalist and author LJK Setright as "the most intelligent application of minimalism ever to succeed as a car."
http://en.wikipedia.org/wiki/Citroën_2CV
I should also mention the famous Citroen 2CV here. It was another simple, tough form of transport. Like the 500, it still has a very loyal following. Weighed in dripping wet at 1200lbs.
From Wikipedia: It was designed to move the French peasantry on from horses and carts. It is considered one of Citroën's most iconic cars. In 1953, 'Autocar' in a technical review of the car wrote of, "...the extraordinary ingenuity of this design, which is undoubtedly the most original since the Model T Ford."[3] It was described by CAR magazine journalist and author LJK Setright as "the most intelligent application of minimalism ever to succeed as a car."
http://en.wikipedia.org/wiki/Citroën_2CV