In 1957 Colin Chapman designed the Lotus 7, with a key principle in mind — “simplify and add lightness”. Its direct descendant, the Caterham 7, is widely regarded as one of the best drivers’ cars in the world today. With a typical family car today weighing upwards of 1400kg, how does a Caterham compare? In this video we weighed five of the most popular models, with different chassis sizes and engine types. How did they compare, both to each other, and to that typical family car?