All our vans can sleep 4 people.
Depending on the T2 type, the T2 sleeps 2 adults and 2 kids or up to 4 adults. It has a 'rock'n roll bed' (that pulls out from the rear) and either 2 additional bunks in the pop up roof section and over the front seats or a double bed in the pop up roof.
The T3 and T4 models sleeps up to 4 adults (or 2 adults and 3 young kids). They have the rock'n roll beds and a double bed in the pop up roof.